Browse evidence-based analysis of health-related claims and assertions
Even after a super hard chest workout, the size of the triceps muscles goes back to normal within a day—meaning the workout didn’t actually tear them up much.
Causal
During a tough leg workout, testosterone levels spike temporarily, but they go back to normal by the next day and don’t stay high.
Quantitative
People push just as hard during the second workout as the first, even though they feel less sore and recover faster.
Descriptive
No matter which type of chest press you do—machine, barbell, or dumbbells—you’ll feel about the same level of soreness in your chest muscles after a hard workout, and it’ll go away at the same rate.
How much your biceps stretch during your first hard workout tells you how sore and weak you’ll feel the next day—but not how much enzyme leaks into your blood.
Correlational
After a heavy leg workout, men can't push as hard with their legs for at least two days — even though they're trained, their strength is still a little weaker.
After doing a barbell chest workout, guys felt way more tired and less recovered than after using dumbbells or a machine—even two days later—suggesting barbells leave you feeling more drained.
After a really tough leg workout, trained men feel weak and tired for about 3 days, but by day 6, they start feeling better than they did before the workout.
The more the biceps stretched during the first workout, the more 'swelling' showed up on the ultrasound scan afterward.
Even though guys lifted the same total weight, those using barbells felt way more sore in their triceps for longer than those using dumbbells—suggesting barbells might be harder on the back of the arm.
After doing heavy leg workouts, the muscles of trained men show a big spike in two specific proteins (IGF-IEa and MGF) that help repair muscle damage, and this spike happens about two days later.
The more the biceps stretched during the first tough workout, the more strength the person lost the next day.
After a tough chest workout, guys using barbells or machines feel sore in their triceps for a few days, but those using dumbbells don’t feel any soreness at all—even though they lifted the same total weight.
People feel less sore after doing the same tough arm workout a second time, four weeks later.
When trained men do different types of chest presses—using a machine, barbell, or dumbbells—their chest muscles and shoulder strength bounce back at about the same rate after a tough workout, no matter how stable the equipment is.
The second time people do a tough arm workout, their muscles show less 'swelling' on ultrasound scans, meaning there's probably less damage or inflammation.
After doing a hard arm workout twice, four weeks apart, people feel stronger sooner the second time—even though they did the same amount of work.
When people who don't normally lift weights do a tough arm exercise twice, four weeks apart, their biceps don't stretch as much the second time, even though they're trying just as hard.
The pause method doesn’t make your muscles more sore the next day or two after your workout than the normal heavy-lift method.
Even though both methods make your triceps the same size after a workout, the pause method makes the ultrasound image look more 'fuzzy' — meaning something inside the muscle changed differently.
Whether you lift heavy without pausing or lift lighter with pauses, your chest muscles swell the same amount right after the workout.
Even though you do more reps and keep your muscles under tension longer with the pause method, your body doesn’t produce more lactic acid or muscle damage markers — meaning intensity matters more than total reps.
Mechanistic
After either workout method, your muscles stay swollen for three full days — meaning your body is still responding to the stress long after the workout ends.
When you pause at the bottom of the bench press, your shoulder muscles work harder and swell more than your chest or arms — meaning your body shifts the work to your shoulders.