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Rest → load, working range

Joint angles · start → finish

Torso
0.0° → 2.0°
Hip
8.0° → 20.0°
Knee
10.0° → 34.0°
Shoulder
18.0° → 26.0°
Elbow
14.0° → 20.0°
Neck
0.0° → 0.0°

Endurance

Jump Rope Ladder

10 × 45s skipping / 30s rest. Quiet feet, short ground contact.

Difficulty 3 of 511.0 METs · Vigorous

Equipment

  • Jump rope

Muscle groups worked

  • Calves
  • Core

What it buys you

Calf endurance is the hidden limiter in standing work. This is the cheapest way to buy more standing minutes.

Capacity trained

Endurance. Aerobic capacity and vascular function. The single best-evidenced physical input to sexual performance.

Energy

Modelled kilocalories

Modelled energy cost for Jump Rope Ladder at 10, 20, 30 and 45 minutes for both reference bodies
Reference body10 min20 min30 min45 min
Male reference · 82 kg158 kcal316 kcal474 kcal710 kcal
Female reference · 68 kg131 kcal262 kcal393 kcal589 kcal

Energy figures are modelled from standard activity MET values (Ainsworth Compendium, 2011) and the ACSM equation, not measured on you. They scale linearly with your own body mass, so a body 10% heavier burns about 10% more at the same intensity.

kcal = METs × 3.5 × bodyweight(kg) ÷ 200 × minutes (ACSM)

Load is effort, not pain. If a movement hurts rather than works, stop and see a clinician. Lifting another person is strength training with a person-shaped load — build the pattern unloaded first.

Honest framing

Training makes a posture available and sustainable. It is capability work, not a treatment for anything, and no single session changes a number. Consistency over eight weeks does.

Free PQ assessment · 6 min

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