The Claim
A 4-second eccentric tempo during knee extension training increases total time under tension by approximately 95% compared to a 2-second eccentric tempo over an 8-week period in untrained adults, without changing the total number of repetitions performed.
What the research says
Not yet evaluated
We are still looking at what the research says.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
If you take four seconds to lower the weight during leg extensions instead of two seconds, your muscles are under strain for about 95% longer—without doing more reps—over eight weeks of training.
See the scientific wording
A 4-second eccentric tempo increases total time under tension by approximately 95% compared to a 2-second tempo during 8 weeks of knee extension training in untrained adults, without altering the total number of repetitions performed.
Score breakdown, mechanism chain, raw evidence, ideal studies needed
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.