Power

Power is strength expressed fast. It’s how hard you can push, pull, throw, or jump — and how quickly you can do it.

Two athletes can both squat 300 lbs. One does it slowly. The other explodes out of the bottom. The second one has more power.

Power matters in almost every sport:

• Jumping for a rebound
• Throwing a punch or a ball
• Sprinting out of a stance
• Tackling, blocking, swinging a bat

Power = force × velocity. You need both. Heavy lifting builds the force. Fast movements teach you to express it quickly. You train both.

The simplest test of power is the vertical jump or the broad jump — how high or far you can launch yourself in one explosive effort.

Power training is a mix of heavy and fast. You need force and speed.

Two tools:

1. Explosive movements (fast, low resistance)

• Jumps (box jump, broad jump, vertical jump)
• Throws (med ball chest pass, overhead throw)
• Olympic lift derivatives (power clean, power snatch, high pull)
• Sprint starts

2. Heavy strength work (slow, high resistance)

• Back squat, front squat, deadlift
• Trap bar deadlift, hip thrust, RDL
• Press, bench, row

The magic happens when you pair them — this is contrast training:

• Heavy back squat (3 reps) → rest 3–4 min → vertical jump (3 reps)
• Heavy trap bar deadlift (3 reps) → rest → broad jump (3 reps)
• Heavy bench press (3 reps) → rest → med ball chest throw (3 reps)

The heavy set “wakes up” your nervous system. The explosive set teaches it to fire fast. Together they build power better than either alone.

Programming rules:

• Do explosive work FIRST, while you’re fresh.
• Quality over quantity. Stop the set when speed drops.
• Full recovery between explosive sets. 2–4 minutes.
• 2–3 power sessions per week. More is too much.
• Progress slowly. Plyometrics can beat up your joints if you jump in too fast.

Tests that matter:

• Vertical jump
• Broad jump
• Med ball throw distance
• 10m sprint
• Power clean 1RM or 3RM

Power is a neuromuscular quality — it depends on how quickly the nervous system can recruit and fire motor units, and how much force the muscle-tendon system can produce.

The force-velocity curve:

Muscle can produce more force at slow velocities and less force at fast velocities. This relationship is not linear — it curves. Power output (force × velocity) peaks at intermediate loads — typically 30–60% of 1RM for most movements.

That means:

• Very heavy (85%+): high force, low velocity, low power output
• Very light (30%−): low force, high velocity, low power output
• 30–60%: the sweet spot for max power

But “the sweet spot” depends on the movement and the athlete. For jump squats, it might be 20–40%. For power cleans, it might be 70–80%.

Rate of force development (RFD):

RFD is how quickly you can ramp up force. It’s measured in the first 200ms of a contraction. High RFD = explosive athlete. Low RFD = slow, grinding athlete even if they’re strong.

Post-activation potentiation (PAP):

A heavy lift or max-effort movement temporarily increases the nervous system’s readiness. Mechanistically: phosphorylation of myosin regulatory light chains makes actin-myosin more sensitive to calcium, and increased motor unit recruitment amplifies the signal. This lasts 4–12 minutes. This is the science behind contrast training.

Stretch-shortening cycle (SSC):

When a muscle is stretched rapidly before shortening (like landing then jumping), it stores elastic energy and enhances force output. The SSC has three phases:

• Eccentric — muscle lengthens (landing)
• Amortization — brief transition (ground contact)
• Concentric — muscle shortens (jumping)

The shorter the amortization phase, the more powerful the movement. Slow amortization = energy leaks. This is why elite jumpers touch the ground for fewer than 200ms.

Programming implications:

• Train across the force-velocity curve. Heavy work builds force. Light work builds velocity. Moderate work builds power.
• Plyometrics must be progressive. Start with low-intensity (pogo hops, box jumps to soft surfaces), build to high-intensity (depth jumps from height).
• Olympic lifts are the gold standard for power because they train the entire curve in one movement.
• RFD improves with explosive training, not with heavy grinding sets. If you want to be explosive, move explosively.
• Recovery matters more than volume. Power is a CNS quality. 48 hours between hard power sessions.

At the research level, power is a biomechanical and neurophysiological quality with measurable determinants and specific training protocols.

Force-velocity profiling:

With a linear position transducer (GymAware, Tendo, or app-based bar tracking), you can plot force vs. velocity across multiple loads and fit a line. This gives:

• F0 — theoretical max force (y-intercept)
• V0 — theoretical max velocity (x-intercept)
• Pmax — max power output (peak of the curve)

With this data, you can identify whether an athlete is force-deficient (needs more heavy work) or velocity-deficient (needs more fast work). This is the current frontier of individualized power training.

Plyometric progression:

Level	Exercise	Ground contact	Intensity
1	Pogo hops, line hops	Short	Low
2	Box jumps (soft landing)	Moderate	Low-moderate
3	Broad jumps, lateral bounds	Moderate	Moderate
4	Depth jumps (30–45cm)	Very short	High
5	Depth jumps (60–90cm), single-leg	Very short	Very high

Volume guidelines (per session):

• Beginner: 40–60 total ground contacts
• Intermediate: 60–100 total ground contacts
• Advanced: 100–150 total ground contacts

Count every jump or hop as one contact. Depth jumps are high-intensity — count them as 2–3.

Olympic lift derivatives:

Full Olympic lifts (Snatch, Clean & Jerk) produce the highest power outputs of any movement — up to 50 W/kg in elite lifters. Derivatives (power clean, hang clean, high pull, jump shrug) are more accessible for most athletes and still highly effective.

Contrast training protocols:

• Heavy → explosive (classic PAP): 85–95% 1RM lift, rest 4–12 min, explosive movement. Max PAP effect.
• Moderate → explosive (complex): 60–80% 1RM lift, rest 1–2 min, explosive movement. Lower PAP but better conditioning effect.
• Explosive → explosive (French contrast): heavy, then plyometric, then loaded jump, then bodyweight jump. Brutal but highly effective for advanced athletes.

Testing battery for power athletes:

• Vertical jump (force plate or Vertec)
• Broad jump
• Reactive strength index (RSI = jump height / ground contact time)
• Peak power on a jump squat or clean pull
• 10m sprint

Test every 4–6 weeks. Small improvements (2cm vertical, 5cm broad) are meaningful.

Individual variation:

• Fiber type: type II fibers dominate power. Genetics contributes ~50%.
• Tendon stiffness: stiffer tendons return more elastic energy.
• Neural drive: trained athletes have higher RFD, faster rate coding, and better intermuscular coordination.
• Age: power peaks 20–30 in males, 18–25 in females. It’s trainable at every age but the ceiling depends on maturation.

Programming takeaways for advanced athletes:

• Profile force-velocity every 6–8 weeks. Adjust the balance accordingly.
• Olympic lift derivatives 2–3× per week, low volume, high quality.
• Plyometrics 2× per week, progressive volume.
• Contrast training on key days for the PAP effect.
• Never train power on fatigued legs. The nervous system is the limiting factor.
• Sleep 7–9 hours. Power is the most sleep-sensitive quality.