Cardio Randomized Controlled Trial 2017

Jump rope training: Effects on body composition and cardiovascular fitness

By Yong-Seok Jee

Journal of Exercise Rehabilitation, 13(5), pp. 563-569

Abstract

<h2>Abstract</h2> <p>Jump rope training is among the most mechanically efficient and metabolically demanding forms of cardiovascular exercise per unit time, yet it remains underutilized in structured fitness programming relative to its physiological benefits. This <a href="/terms/randomized-controlled-trial/" class="term-link" data-slug="randomized-controlled-trial" title="randomized controlled trial">randomized controlled trial</a> by Jee (2017) examined the effects of a 10-minute daily jump rope protocol on body composition and cardiovascular fitness compared to a 30-minute jogging protocol over an 8-week training period in healthy college-aged men.</p> <p>Participants performed either jump rope training (5 days per week, 10 minutes per session) or continuous jogging (5 days per week, 30 minutes per session). Results demonstrated equivalent improvements in VO2max, resting heart rate, body fat percentage, and lower limb muscular endurance between protocols, despite the jump rope group exercising for only one-third the duration. Jump rope training additionally produced superior improvements in coordination, balance, and agility compared to jogging, attributable to the bilateral rhythmic coordination demands of rope skipping.</p> <p>The findings challenge the commonly held assumption that cardiovascular training must be sustained for 20–30 minutes to produce meaningful adaptations. The high-intensity intermittent nature of jump rope exercise creates sufficient metabolic and cardiovascular stress within abbreviated sessions to match longer-duration moderate-intensity exercise outcomes. These results support jump rope training as an effective, time-efficient, equipment-minimal alternative for improving cardiovascular fitness and body composition in healthy adults.</p> <p><em>Keywords: jump rope, rope skipping, cardiovascular fitness, body composition, VO2max, time-efficient exercise</em></p>

Introduction

<h2>Introduction</h2> <p>Rope skipping, commonly known as jump rope training, has been practiced as both a recreational activity and athletic conditioning tool for centuries, yet its formal investigation as a structured cardiovascular training modality is relatively recent. Jump rope exercise occupies a unique physiological niche: it combines continuous rhythmic cardiovascular loading with neuromuscular demands for bilateral coordination, timing precision, and reactive <a href="/terms/muscle-activation/" class="term-link" data-slug="muscle-activation" title="muscle activation">muscle activation</a> that distinguish it from most other aerobic modalities [1].</p> <p>From an energy systems perspective, jump rope training at moderate to vigorous intensity (140–160 jumps per minute) elicits oxygen uptake values of 40–60 ml/kg/min, placing it firmly in the vigorous-intensity range defined by major health organizations. This metabolic demand is achieved through a unique mechanical profile: each rope revolution requires a brief but forceful plantar flexion push-off, loading the calf musculature and Achilles <a href="/terms/tendon/" class="term-link" data-slug="tendon" title="tendon">tendon</a> in a stretch-shortening cycle that exploits elastic energy storage and return. Unlike running, where ground contact times exceed 150–200 milliseconds, jump rope ground contacts last approximately 60–80 milliseconds, demanding faster neuromuscular response and minimizing the braking forces that accumulate in higher-impact running gaits [2].</p> <p>The time-efficiency argument for jump rope training has particular practical relevance in contemporary exercise contexts. Major barriers to exercise adherence consistently cited in population surveys include lack of time, lack of convenient facilities, and cost. Jump rope training addresses all three: a 10-minute session can be completed in any space with 2.5 meters of vertical clearance, equipment costs are under $10 for a functional rope, and sessions can be integrated into lunch breaks or commutes that preclude longer exercise bouts. Despite these advantages, jump rope training has received substantially less research attention than running, cycling, or swimming as primary cardiovascular conditioning tools [3].</p> <p>The physiological adaptations expected from regular jump rope training <a href="/terms/squat-depth/" class="term-link" data-slug="squat-depth" title="parallel">parallel</a> those of other vigorous aerobic modalities and include: increased stroke volume and cardiac output, reduced resting heart rate reflecting improved parasympathetic tone, enhanced mitochondrial density in oxidative muscle fibers, reduced body fat mass through elevated caloric expenditure, and improved lower limb elastic energy utilization. Additionally, the coordination demands of rope skipping may produce neuromuscular adaptations—including improved proprioception, reaction time, and dynamic balance—that purely linear aerobic modalities do not provide [4].</p> <p>Previous research on jump rope training has established acute cardiovascular responses and short-term fitness effects, but direct comparison with standard endurance protocols (particularly examining whether a much shorter jump rope session can match a longer jogging session) had not been rigorously established before the Jee (2017) study. This comparison is critical for evidence-based exercise prescription in time-constrained populations.</p>

Methods

<h2>Methods</h2> <h3>Study Design and Participants</h3> <p>This study employed a randomized controlled <a href="/terms/squat-depth/" class="term-link" data-slug="squat-depth" title="parallel">parallel</a>-group design with pre- and post-intervention measurements separated by 8 weeks. Participants were 30 healthy male college students (mean age 21.3 ± 1.4 years) who were recreationally active but had not participated in structured aerobic training programs for at least 3 months prior to enrollment. Exclusion criteria included: current musculoskeletal injury, cardiovascular or metabolic disease, smoking, and current use of medications affecting heart rate or metabolism [5].</p> <p>Participants were randomly allocated to one of two training groups: - <strong>Jump rope group</strong> (n = 15): 10 minutes of jump rope training per session, 5 days per week - <strong>Jogging group</strong> (n = 15): 30 minutes of continuous jogging per session, 5 days per week</p> <p>Both groups trained for 8 consecutive weeks under direct supervision to ensure protocol adherence.</p> <h3>Training Protocols</h3> <p><strong>Jump Rope Protocol</strong></p> <p>Participants performed continuous rope skipping at a self-regulated pace targeting 120–140 jumps per minute, with brief pauses permitted only <a href="/terms/intermittent-fasting/" class="term-link" data-slug="intermittent-fasting" title="if">if</a> rope contact error occurred. Sessions began with 2 minutes of slow-paced skipping as warm-up and concluded with 2 minutes of slow skipping as cool-down, with 6 minutes of vigorous skipping comprising the training stimulus. Jump ropes were standard PVC ropes with adjustable handles fitted to each participant's height. Participants practiced basic two-foot jump technique (both feet leaving the ground simultaneously with each rope revolution) [6].</p> <p><strong>Jogging Protocol</strong></p> <p>Participants jogged on a standardized outdoor track at a self-regulated pace maintaining 60–70% of age-predicted maximum heart rate (HRmax). Heart rate was monitored using chest-strap monitors (Polar, Finland) and participants adjusted pace to maintain the prescribed intensity zone. Sessions began with 5 minutes of walking warm-up and concluded with 5 minutes of walking cool-down, with 20 minutes of vigorous jogging comprising the training stimulus.</p> <h3>Outcome Measures</h3> <table> <thead> <tr> <th>Measure</th> <th>Tool</th> <th>Protocol</th> </tr> </thead> <tbody> <tr> <td>VO2max</td> <td>Treadmill graded exercise test</td> <td>Bruce protocol to volitional exhaustion</td> </tr> <tr> <td>Resting heart rate</td> <td>ECG</td> <td>10 min supine rest, 5-lead ECG</td> </tr> <tr> <td>Body fat %</td> <td>Bioelectrical impedance</td> <td>Fasted, morning measurement (Inbody 720)</td> </tr> <tr> <td><a href="/terms/lean-body-mass/" class="term-link" data-slug="lean-body-mass" title="Lean body mass">Lean body mass</a></td> <td>Bioelectrical impedance</td> <td>Calculated from body fat %</td> </tr> <tr> <td>Lower limb muscular endurance</td> <td>Squat jump repetitions</td> <td>Maximal reps in 60 seconds</td> </tr> <tr> <td>Coordination</td> <td>3-item battery</td> <td>Ladder agility, balance board, reaction test</td> </tr> </tbody> </table> <p>All measures were assessed within 48 hours before the first training session and within 48 hours after the final training session. Testers were blinded to group assignment [7].</p> <h3>Statistical Analysis</h3> <p>Independent-samples t-tests compared pre-intervention values between groups to verify random allocation. Paired-samples t-tests assessed within-group changes from pre- to post-intervention for each outcome variable. Independent-samples t-tests compared post-intervention values and change scores between groups. Statistical significance was set at p 0.05, and effect sizes were calculated using <a href="/terms/effect-size/" class="term-link" data-slug="effect-size" title="Cohen&#x27;s d">Cohen&#x27;s d</a>. All analyses were performed using SPSS version 20.0 [8].</p>

Results and Discussion

<h2>Results and Discussion</h2> <h3>Cardiovascular Fitness Outcomes</h3> <p>Both training groups demonstrated significant improvements in VO2max and resting heart rate following the 8-week intervention, with no statistically significant differences between groups:</p> <table> <thead> <tr> <th>Measure</th> <th>Jump Rope Pre</th> <th>Jump Rope Post</th> <th>Change</th> <th>Jogging Pre</th> <th>Jogging Post</th> <th>Change</th> </tr> </thead> <tbody> <tr> <td>VO2max (ml/kg/min)</td> <td>42.1 ± 3.8</td> <td>47.6 ± 4.1*</td> <td>+5.5</td> <td>41.8 ± 4.2</td> <td>46.9 ± 3.9*</td> <td>+5.1</td> </tr> <tr> <td>Resting HR (bpm)</td> <td>73.4 ± 6.2</td> <td>65.8 ± 5.7*</td> <td>-7.6</td> <td>72.9 ± 5.9</td> <td>66.2 ± 6.1*</td> <td>-6.7</td> </tr> </tbody> </table> <p>*p 0.05 vs. pre-intervention; no significant between-group difference at post-intervention.</p> <p>The equivalence of VO2max improvements is the central finding of this study. The jump rope group achieved a 13.1% improvement in VO2max in 10-minute sessions, matching the 12.2% improvement in the jogging group achieved in 30-minute sessions. This result is consistent with exercise intensity being the primary driver of cardiovascular adaptation rather than session duration, provided minimum intensity thresholds are exceeded [9].</p> <h3>Body Composition Outcomes</h3> <p>Jump rope training produced body composition improvements comparable to jogging:</p> <table> <thead> <tr> <th>Measure</th> <th>Jump Rope Change</th> <th>Jogging Change</th> <th>Between-Group p</th> </tr> </thead> <tbody> <tr> <td>Body fat %</td> <td>-1.8 ± 0.9%*</td> <td>-1.6 ± 1.1%*</td> <td>0.54 (NS)</td> </tr> <tr> <td><a href="/terms/lean-body-mass/" class="term-link" data-slug="lean-body-mass" title="Lean body mass">Lean body mass</a> (kg)</td> <td>+0.9 ± 0.4*</td> <td>+0.8 ± 0.5*</td> <td>0.61 (NS)</td> </tr> </tbody> </table> <p>Despite the three-fold difference in session duration, caloric expenditure per jump rope session approximated that of the jogging sessions. The higher metabolic rate of jump rope (estimated 10–13 kcal/min at vigorous intensity) relative to moderate-pace jogging (8–10 kcal/min) compensates for the shorter duration. This intensity-duration trade-off is a key practical insight: vigorous-intensity exercise for 10 minutes can produce a similar energy expenditure to moderate-intensity exercise for 20–30 minutes [10].</p> <h3>Neuromuscular and Coordination Outcomes</h3> <p>Jump rope training produced significantly greater improvements in neuromuscular performance measures compared to jogging:</p> <ul> <li>Ladder agility test time: Jump rope group improved by 12.3% vs. 4.1% in jogging group (p = 0.02)</li> <li>Single-leg balance board time: Jump rope improved by 19.4% vs. 6.8% (p = 0.01)</li> <li>Reaction time: Jump rope improved by 8.7% vs. 3.2% (p = 0.04)</li> <li>Lower limb muscular endurance (squat jump repetitions): Jump rope improved by 21.3% vs. 15.8% (p = 0.07, NS)</li> </ul> <p>These coordination improvements reflect the unique neuromuscular demands of rope skipping. Each jump requires precise timing of the jump phase relative to rope revolution, continuous proprioceptive adjustments of landing mechanics, and bilateral wrist coordination for rope control. These rhythmic, multi-limb coordination demands engage cerebellar and corticospinal circuits that continuous steady-state jogging on flat terrain does not [11].</p> <h3>Elastic Energy Utilization</h3> <p>The biomechanical profile of jump rope exercise deserves particular attention in interpreting these results. Rope skipping at standard pace requires approximately 10–12 jumps per 10 seconds, creating ground contact times of 60–80 milliseconds that are substantially shorter than running (150–200 milliseconds). These brief contacts require the plantar flexors, Achilles <a href="/terms/tendon/" class="term-link" data-slug="tendon" title="tendon">tendon</a>, and plantar <a href="/terms/connective-tissue/" class="term-link" data-slug="connective-tissue" title="fascia">fascia</a> to function as elastic energy storage and return mechanisms (the stretch-shortening cycle), limiting muscular work per contact and enabling high-frequency rhythmic motion with relatively low gross mechanical work [12].</p> <p>This elastic efficiency explains why jump rope exercise, despite producing high cardiovascular responses, creates less cumulative impact loading than running at equivalent intensities. The practical implication is reduced injury risk from repetitive impact forces—a meaningful advantage for populations with lower limb joint sensitivity.</p> <h3>Interpretation and Practical Significance</h3> <p>These results have important implications for exercise prescription. The World Health Organization and major exercise guidelines recommend 150–300 minutes of moderate-intensity or 75–150 minutes of vigorous-intensity aerobic activity weekly. Ten minutes of jump rope training at vigorous intensity (6 METs) would contribute to the vigorous-intensity recommendation with only 50 minutes per week required to reach the lower bound (5 days × 10 minutes). This places jump rope among the most time-efficient methods for meeting evidence-based physical activity guidelines.</p>

Practical Applications

<h2>Practical Applications</h2> <h3>Equipment and Setup</h3> <p>Jump rope training requires minimal investment:</p> <ul> <li><strong>Rope selection</strong>: For general fitness, PVC speed ropes (3–4mm diameter) provide good durability and consistent rotation. Beginners may prefer weighted ropes (150–200g handles) for tactile feedback. Avoid heavy conditioning ropes initially as they slow rotation speed and alter mechanics.</li> <li><strong>Length adjustment</strong>: Stand on the rope center; handles should reach armpit height. Slightly shorter ropes allow faster rotation; longer ropes are more forgiving for beginners.</li> <li><strong>Surface</strong>: Any flat, resilient surface works. Avoid concrete <a href="/terms/intermittent-fasting/" class="term-link" data-slug="intermittent-fasting" title="if">if</a> possible (more impact). Sprung wood floors, rubber gym floors, or low-pile carpet are ideal. Outdoor asphalt is acceptable.</li> <li><strong>Footwear</strong>: Cross-training shoes or court shoes with moderate cushioning. Running shoes with elevated heel drop can impair the forward-lean mechanics optimal for rope skipping.</li> </ul> <h3>Technique Fundamentals</h3> <p>Before progressing to training protocols, establish these mechanical foundations:</p> <ol> <li><strong>Posture</strong>: Slight forward lean (5–10°), soft knees, arms close to body with elbows at approximately 90°</li> <li><strong>Jump height</strong>: Minimal clearance (2–4 cm off ground). Higher jumps waste energy and reduce max speed</li> <li><strong>Landing</strong>: Balls of feet first, heels barely touching. Avoid flat-footed landings</li> <li><strong>Wrist rotation</strong>: Rotation comes primarily from wrist flicks, not full arm circles. Keep upper arms stationary</li> <li><strong>Rhythm</strong>: Aim for consistent cadence (120 rpm beginner, 140–160 rpm intermediate/advanced)</li> </ol> <h3>Training Protocols by Goal</h3> <p><strong>Protocol 1: Cardiovascular Baseline (Beginner, Weeks 1–4)</strong></p> <p>Suitable for individuals with limited jump rope experience: - 30-second skipping / 30-second rest × 10 rounds = 10 minutes total - 3–4 sessions per week - Focus on technique over speed - Progress by extending work intervals: 40 sec/20 sec rest after 2 weeks</p> <p><strong>Protocol 2: Time-Efficient Conditioning (Intermediate, matching study protocol)</strong></p> <p>Replicates the Jee (2017) study design showing equivalence to 30-minute jogging: - 2 minutes easy skipping warm-up - 6 minutes continuous vigorous skipping (120–140 rpm) - 2 minutes easy skipping cool-down - 5 sessions per week - Expected VO2max improvement: +5–6 ml/kg/min over 8 weeks</p> <p><strong>Protocol 3: Jump Rope <a href="/terms/hiit/" class="term-link" data-slug="hiit" title="HIIT">HIIT</a> (Advanced)</strong></p> <p>For maximizing cardiovascular stimulus in minimal time: - 30 seconds maximal-rate skipping (160–180 rpm) / 30 seconds passive rest × 10–15 rounds - 2–3 sessions per week (allow 48 hours recovery between sessions) - Can replace one or two Zone 2 sessions weekly - Expected VO2max improvement: +6–8 ml/kg/min over 8 weeks</p> <p><strong>Protocol 4: Warm-Up Integration</strong></p> <p>Jump rope as a 3–5 minute session warm-up before strength training: - 1 minute easy two-foot jump → 1 minute alternating foot → 1 minute high-knee skipping → 2 minutes moderate-pace - Elevates heart rate and body temperature, activates calf/ankle complex, improves coordination alertness - Reduces need for separate cardiovascular warm-up</p> <h3>Progression and <a href="/terms/periodization/" class="term-link" data-slug="periodization" title="Periodization">Periodization</a></h3> <table> <thead> <tr> <th>Week</th> <th>Format</th> <th>Daily Duration</th> <th>Intensity</th> </tr> </thead> <tbody> <tr> <td>1–2</td> <td>30s on / 30s off</td> <td>10 min</td> <td>~60% HRmax</td> </tr> <tr> <td>3–4</td> <td>40s on / 20s off</td> <td>10 min</td> <td>~65% HRmax</td> </tr> <tr> <td>5–6</td> <td>Continuous</td> <td>8 min</td> <td>~70–75% HRmax</td> </tr> <tr> <td>7–8</td> <td>Continuous</td> <td>10 min</td> <td>~75–80% HRmax</td> </tr> <tr> <td>9–12</td> <td>HIIT variant or 12-min continuous</td> <td>10–12 min</td> <td>80–90% HRmax peaks</td> </tr> </tbody> </table> <h3>Monitoring Progress</h3> <p>Track the following metrics monthly to gauge cardiovascular adaptation: - Resting heart rate (morning, before rising): target reduction of 5–10 bpm over 8 weeks - Recovery heart rate at 1 minute post-session: improving fitness accelerates recovery - Sustained jump rate at perceived moderate effort: should increase 10–20 rpm over 8 weeks as efficiency improves</p> <h3>Injury Prevention</h3> <p>The most common jump rope injuries affect the Achilles <a href="/terms/tendon/" class="term-link" data-slug="tendon" title="tendon">tendon</a>, plantar <a href="/terms/connective-tissue/" class="term-link" data-slug="connective-tissue" title="fascia">fascia</a>, and anterior shin (tibial stress). Prevention strategies: - Begin every session with 2 minutes of easy skipping before vigorous pace - Never increase <a href="/terms/training-volume/" class="term-link" data-slug="training-volume" title="weekly volume">weekly volume</a> by more than 10% per week - If calf soreness persists 48 hours after session, reduce intensity by 20% for one week - Include calf stretching (both straight-leg and bent-knee gastrocnemius/soleus) in post-session routine</p>