A recent study shows that many repetitions of light weights appear to be just as effective as fewer reps of heavy weights. This is fantastic news for folks who want the benefits of resistance exercise but find heavy weights unappealing. Keep in mind that you’ll need to lift until “failure” — in other words, until you can’t lift any further with proper form. If you’re using free weights, get the help of a spotter to avoid injury (though going solo is okay if you’re on the machines). The benefits of resistance exercise are legion, from weight management to heart and bone health, so if you haven’t made time for it yet, now is the perfect time to start.
“This study goes against the conventional wisdom that you need heavy loads to gain strength and tone,” Cleveland Clinic fitness specialist Ryan Sidak.