If you simply lift with light weights and high reps, you will never create strong contractions in the muscle.
Strong contractions are what create firm and tight muscles.Click here to learn how to get ultra-lean by eating a high carb diet (opposite of keto).
Lifting heavy weights is the best way to create these strong contractions.
Here’s a video explaining 5 reasons why you need to lift heavy weights.
In the video, he recommends training heavy enough to make 3-8 reps challenging.
I have a slightly different recommendation.
If you want to dramatically increase strength and definition WITHOUT adding muscle size, pick a weight you can lift 8 times and stop at 5 reps.
I talk about this in detail in the most popular article on my site:
This is the approach I recommend for people who want to get strong while maintaining a sleek build.
As a former fitness coach to fashion models, I can teach you how to increase muscle definition without adding size.
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