When performing bench presses to exhaustion at 70% of maximum strength, two different training styles—focusing on bar speed versus controlled movement tempo—produce the same amount of anaerobic...
Mechanism
Synthesis from 1 study
Lifting faster makes your muscles use more oxygen during the workout, so they don’t need to rely as much on the energy system that causes fatigue. Even though you do more total work, the amount of fatigue-causing energy produced stays the same — which is why both methods feel equally hard at...
Most probable mechanism
When you lift the weight quickly, your muscles need energy faster, so your body uses more oxygen to make energy during the lift. This lets you do more reps without needing to rely more on the anaerobic system that produces fatigue. Even though you do more total work, the amount of energy made without oxygen stays the same because the oxygen system picks up the extra load.
Maximal concentric velocity increases the rate of muscle contraction and power output, raising the immediate energy demand per unit time.
The increased power output elevates the demand for ATP regeneration beyond the capacity of immediate anaerobic stores, requiring faster oxygen delivery to mitochondria.
Increased oxygen delivery and utilization shift the relative energy contribution from anaerobic to aerobic metabolism, sustaining ATP production without increasing lactate or H+ accumulation.
Sustained aerobic ATP production allows more repetitions to be completed before fatigue limits performance, increasing total volume load without increasing anaerobic energy expenditure.
Evidence from Studies
Supporting (1)
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Bench-Press Performed With a Velocity- and Tempo-Based Approach: Are There Differences in Volume Load, Time Under Tension, and Metabolic Demands?
Contradicting (0)
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Gold Standard Evidence Needed
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