Because the bones and ligaments are less supplied with blood, and therefore with oxygen and nutrients. I remember back when I was getting my certificate to be a professional fitness coach. Just for fun we had to pick one exercise from a popular fitness magazine and implement it in our training.
Some of the concepts presented herein may be theoretical. The first can be heavy, done for low reps, and the second lighter for higher reps. Or, go light first. For instance, if you’re going to squat 300 pounds, you’ll need sets with loads of around 135, 185, 225, and 275 under your belt beforehand to be properly prepared.
We know that building means to erect, create, construct, or assemble something. Well, bodybuilding is essentially constructing muscles and strengthening one's body through exercise, typically weight lifting. Bodybuilders are not hard to spot; their muscles protrude from their body and are perfectly curved. They often have visible popping veins due to the muscles pushing them to the surface of the skin.