Sixty seconds. That’s roughly the length of stretch hold that research links to measurable drops in strength and power output, and it’s precisely the habit many gym-goers pick up believing they’re doing themselves a favour. The evidence tells a more nuanced story than “stretching is bad”, but if you’ve been holding long static stretches right before your working sets and wondering why your squat or bench numbers won’t budge, the science offers a plausible explanation.
Key takeaways
- A 60-second stretch hold triggers measurable drops in muscle force and neural drive before you even load the bar
- The threshold isn’t arbitrary—research shows a clear performance cliff between sub-60 second and longer-duration stretches
- The fix isn’t abandoning flexibility work; it’s timing and type—and one simple tweak could unlock gains you’ve been leaving on the table
What actually happens to your muscles during a long hold
Static Stretching, the classic “reach and hold” approach, has been a warm-up staple for decades. But researchers have spent the last 25 years picking apart What It Actually Does to the neuromuscular system before you lift. Extensive research over the past 25 years suggests that prolonged static stretching negatively affects performance, especially in strength- and power-based activities. The mechanism isn’t mysterious once you understand it: holding static stretches for 60 seconds or longer can reduce muscle tension and neural drive, thereby inhibiting force output and explosive power.
That phrase “neural drive” is the key. Your muscles don’t just need to be limber to produce force, they need your nervous system to recruit them efficiently. A 2025 study using electromyography on 25 active men found that a 60-second static stretch of the quadriceps, hamstrings, and calves disrupted the coordinated firing patterns muscles normally use during explosive movements like a squat jump. The stretching altered how muscle groups worked together, not just how much they individually contracted.
The duration genuinely matters here, and it isn’t a vague guideline. One frequently cited analysis found that for individuals that held the stretch for less than 60 seconds, a mean reduction of 1.1% was observed and categorized as a small reduction, whereas a moderate reduction of 4.6% was noted in the population that held the stretch for longer than 60 seconds, indicating a dose-response relationship between stretching and maximal muscle performance. A more recent systematic review with a multilevel meta-analysis reached a similar conclusion, confirming that stretching performed more than 60 seconds acutely impairs maximal strength when tested in isolation, though complex speed performance tasks such as jumping or sprinting, and explosive strength or rate of force development, did not show significant reductions.
So the picture that’s emerged isn’t “any stretching wrecks your lifts”. It’s specifically the long, sustained hold, particularly when you’re chasing a one-rep max or an explosive lift, that seems to blunt the force your muscles can generate straight afterwards. If you’ve been holding a hamstring or quad stretch for a minute or more before your heaviest sets, you may well have been quietly sabotaging the very lifts you were trying to protect.
Where the 60-second line actually comes from
The threshold isn’t arbitrary. Sport scientists Kay and Blazevich, whose work is cited repeatedly in this field, examined pre-exercise stretching protocols and found a clear split in outcomes depending on hold time. Static stretches under 45 seconds can be used in a pre-exercise protocol without significant decreases in strength, power, or speed-dependent task performance, while stretches over 60 seconds are more likely to cause a small or moderate reduction in performance. A separate comprehensive review reinforced this, noting that short-duration static stretching of 60 seconds or less per muscle group trivially impairs subsequent strength and power activities, by roughly 1 to 2 percent, whereas longer durations beyond 60 seconds per muscle group appear to induce substantial and practically relevant declines of 4 to 7.5 percent.
What’s happening physiologically seems to come down to stiffness and activation. Increased compliance of the musculotendinous unit that lowers its stiffness has been discussed alongside lower motor unit activation as underlying mechanisms. A looser, more compliant tendon transmits force less efficiently, a bit like trying to crack a whip made of elastic rather than rope. Combine that with a nervous system that’s temporarily recruiting fewer motor units, and you get exactly the kind of stalled numbers that frustrated lifters report.
There’s also a subtler cost that doesn’t show up on the bar itself. Research on knee extensor force control found that prolonged static stretching has the potential to impact muscle force control, meaning your ability to produce a smooth, steady contraction, not just a maximal one, degrades too. For anyone chasing technical precision under load, that’s as relevant as the raw percentage drop in one-rep max.
What to do instead before you lift
None of this means flexibility work is pointless, and I wouldn’t want anyone to ditch stretching altogether out of fear. The injury-prevention story is genuinely more layered than “stretch and you’re safe”. Interestingly, recent evidence suggests that when included in a full warm-up routine, short-duration static stretching may even contribute to lowering the risk of musculotendinous injuries, especially with high-intensity activities like sprinting and change-of-direction work. The problem was never stretching itself; it was stacking long holds immediately before maximal or explosive lifts.
The practical fix is straightforward. Keep any static holds brief, under 45 to 60 seconds per muscle group, and save the longer, more meditative stretching sessions for after training or for separate mobility days when performance isn’t on the line. Before you actually lift, lean on dynamic movements instead: leg swings, bodyweight lunges, controlled squats, banded walks, anything that takes joints through range while keeping the muscle actively contracting rather than passively lengthened.
One detail worth remembering if you do want some static work in your warm-up: post-stretching dynamic activity is recommended for reducing muscle injuries and increasing joint range of motion, with inconsequential effects on subsequent athletic performance. In practice, that means a short static stretch followed by a few minutes of dynamic, sport-specific movement before your first working set tends to cancel out the force deficit while still giving you the mobility benefit. Structure your warm-up that way, and there’s a decent chance those stalled numbers start moving again. As always, if you’re dealing with persistent pain or an existing injury, that’s a conversation for your GP or a physiotherapist, not a training blog.
Sources : ncbi.nlm.nih.gov | pmc.ncbi.nlm.nih.gov