Lifting Light vs Heavy Weight: Is one better than the other? Choosing a weight to work out with isn’t black or white – here’s what you should know.
When it comes to working out, there’s a lot of information out there about if you should or not — and it can get pretty confusing, fast. Some people opt for heavyweights when they want to achieve more visible muscles or “bulk” up, and some people are afraid to lift heavy weights for that exact reason.
Unfortunately, many women still believe the myth that lifting heavy weights will give them bulky muscles, so they choose light or no weights that promises “long, lean muscles” instead.
But is any of this information even true? (not really). Choosing the right weight for you to lift is all about how you’re working out, not the number on the dumbbells.
It all comes down to reps.
People lift weights intending to make their muscles stronger (and, for some, to get those bulky biceps or lean-looking arms). For those looking to develop large muscles, they will likely opt for a heavier weight, while people who want to get lean will stick to something smaller.
The truth is, there’s no correct strategy – both are valid choices. By lifting heavy dumbbells, kettlebells, and barbells, you will undoubtedly make you stronger. But lighter weights can help you get stronger too – it just may take you a bit longer.
It all comes down to one crucial factor: muscle fatigue. This means that the goal of your workouts should be to work your muscles to the point of fatigue (i.e., when you can no longer do another rep) no matter how much weight you are using. So whether you are doing five dumbbell curls with a 20-pound weight, or 20 reps with a 5-pound weight, as long as you are getting to the point of muscle fatigue, you’ll get stronger.
And science backs this up. A 2010 study  found that a group of men who lifted heavyweights to the point of “failure” or muscle fatigue gained the same amount of muscle and improved their strength as much as the other group that lifted lighter weights for more reps. This study  in 2016 found the same results.
Some workouts that you might do that use light weights include a barre class, yoga sculpt, Pilates, or “sculpting” classes. Or a light-weight workout may look like doing bicep curls with a lighter weight (like say 8-10 pounds) until you can’t lift any more with good form. On the other end of the spectrum is doing squats with an Olympic barbell, which will fatigue your muscles after only a few reps.
The benefits of lifting lightweights
Using lighter weights can help you build muscle – it just may take longer to get results. What are some of the reasons you may choose to lift lightweights over heavy?
If you’re new to working out or starting a new fitness program, lightweights may be the right choice. Someone may choose to train with less resistance when they are learning the form of new exercises. Then once they get the form down and feel comfortable, they can increase the resistance.
Other things you can consider are that lightweights are an excellent option for reducing the risk of injury – you’re just less likely to hurt yourself using a 5-pound weight over say, a 50-pound weight.
You can also bring lightweights into other types of workouts to add more resistance and keep yourup. For example, in some dance cardio classes, you can do dance routines while also holding a 2- or 3-pound weight, which adds resistance and makes the cardio workout harder. By the time you finish the dance, your arms feel like they can’t hold the 3-pound weights – let alone anything more substantial.
That said, lifting heavy has its own set of benefits, and can increase the challenge if that’s what you’re looking for in your workout routine.
What are the benefits of working out with heavier weights?
If you’re looking to gain muscle, and increase your strength in the most efficient way possible, then lifting heavy weights is a good option for you. Gaining strength all comes down to muscle fatigue, and heavyweights will get you there faster. It just takes longer to get tired when you’re curling a 5-pound weight versus a 25-pound dumbbell. Heavy compound exercises offer the most bang for your buck. You can use the heaviest load possible and work more muscles in less time, making them efficient and also advantageous for weight loss.
And if you’re looking for more cardio in your routine, you can do that with heavy weights if you’re strategic about your weight-training workouts. You can even perform the exercises circuit style in a row and get the added benefit of conditioning work all in one.
How do you know when you should lift heavier?
It’s a smart idea to start lifting heavier weights slowly and at your own pace. So say you’ve been working out for a while, and the 5-pound weights aren’t working anymore. What should you do? Go more substantial, of course; make sure you move at your own pace.
Accordingly, it would be best if you worked your way up slowly over time and always try to challenge yourself. No matter what rep range you’re lifting in for your working sets, the last one or two reps should be a severe challenge and struggle. If it is not, then you know you need to increase the resistance.
Lifting Light vs Heavy Weight Summary
All science and trainer advice aside — the most important thing about your fitness and workout routine is that you’re doing something consistently. And the chances are that’s the workout that is the most fun and engaging for you, no matter what kinds of weights you use.
I hope you found this article helpful and informative. If you have anything that you would like to share or any opinions about my website, please do speak up. I look forward to your comments, questions, and the sharing of ideas.
Disclaimer: I am not a personal trainer or a healthcare professional. The information contained in this article is for educational and informational purposes only. It is not intended as health or medical advice. Always consult a physician or other qualified health provider regarding any questions you may have about a medical condition or health objectives.