The Claim

In young, resistance-trained men, performing low-load knee extension exercise with a slow cadence (6 seconds concentric and 6 seconds eccentric) to failure increases myofibrillar protein synthesis by 2.3-fold during 24–30 hours of recovery compared to a work-matched fast-cadence condition (1 second per phase), and prolonged muscle time under tension enhances delayed anabolic responses to protein feeding.

Source: Muscle time under tension during resistance exercise stimulates differential muscle protein sub‐fractional synthetic responses in men

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
53score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

In young men trained in resistance exercise, performing knee extensions with a slow movement pattern to muscle failure results in a 2.3-fold higher rate of myofibrillar protein synthesis during the 24 to 30 hours after exercise compared to performing the same exercise with a fast movement pattern, and longer muscle tension during the exercise leads to a stronger protein synthesis response following protein intake.

See the scientific wording

In young, resistance-trained men, performing low-load knee extension exercise with a slow cadence (6 seconds concentric and 6 seconds eccentric) to failure increases myofibrillar protein synthesis by 2.3-fold during 24–30 hours of recovery compared to a work-matched fast-cadence condition (1 second per phase), suggesting that prolonged muscle time under tension enhances delayed anabolic responses to protein feeding.

Why this might work

When muscles are worked slowly until exhausted, more muscle fibers are activated and stay active longer, which keeps a key growth signal turned on for many hours. When protein is eaten later, this lingering signal makes the muscle use the protein to build more muscle fibers than it would after fast lifting.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Muscle time under tension during resistance exercise stimulates differential muscle protein sub‐fractional synthetic responses in men

    In young weightlifters, lifting light weights slowly until tired leads to a much bigger boost in muscle building 24–30 hours later than lifting the same weight quickly — likely because slow lifts better prepare muscles to use protein for growth.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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