Many gym journeys end almost as soon as they begin because of how gruelling weightlifting can be. Heavy weights often feel intimidating, leading many to believe that the gym simply isn’t for them. But here’s the good news: you don’t always have to lift heavy to see results.
A new study suggests that training with lighter weights can be nearly as effective as going heavy. If you’ve dreaded hitting the gym or struggled to stay consistent because of intense lifting sessions, this might change the way you look at your workouts.
For the study conducted in Canada, researchers recruited 20 healthy young men who did not normally engage in weight training. They trained under supervision for 10 weeks. Each session required them to perform three sets of bicep curls and knee extensions.
What counts as heavy and what counts as light?
But here’s where it gets interesting: each hand used different weights for the exercises, and the same approach was applied to their legs. To compare heavy and light weight training more accurately, one arm and one leg were randomly assigned to lift heavier weights, while the opposite arm and leg performed the exercises with lighter weights.
The heavy weights were challenging enough that participants could not perform more than 12 repetitions. In contrast, the lighter weights allowed them to complete up to 25 repetitions before stopping due to fatigue. Once participants were able to exceed the set repetition range for either the heavy or light weights, the load was gradually increased.
No, you cannot keep using a 3 kg dumbbell forever and expect to get stronger. That would eventually lead to a strength plateau.
So what happened after 10 weeks?
The participants’ muscles were stronger and bigger, with little difference between the left and right limbs. The arm that trained with lighter weights was just as muscular as the one that lifted heavier loads, and the same was true for the legs.
Lifting lighter weights for more repetitions and heavier weights for fewer repetitions proved equally effective. The key was pushing the muscles to fatigue. A similar study is underway for women as well.
Even a major review in 2023 looked at hundreds of earlier studies and found that any kind of weight training helps build strength and muscle compared to not exercising at all. You do not have to lift heavy weights to see results. Lighter weights can work just as well.
This approach is especially beneficial for those who feel overwhelmed by heavy weights. It also challenges the common belief among many gym-goers and even trainers who think lifting heavy is the only way to build muscle and gain strength.
Either way, weight training is important
And beyond the debate of heavy versus light, here’s something worth remembering: weight training itself is one of the most powerful things you can do for your body. It’s not just about bigger biceps or toned legs. Strength training helps preserve muscle mass as you age, supports joint health, improves posture and balance, and even boosts bone density. In fact, building muscle is one of the most effective ways to future-proof your body against injuries and everyday aches.
It also does more behind the scenes than you may realise. It improves metabolism, helps regulate blood sugar levels, and supports fat loss by increasing lean muscle mass
So, what’s stopping you from hitting the gym now?
