If you have a really busy life that you can’t make it to the gym. Try this routine with light weights! If you take two light dumbbells and perform 15 hammer curls, 15 bent-over rows, 15 tricep kickbacks, 15 lateral raises, and 15 overhead presses, you’ve got a full upper-body circuit that builds real endurance and strength in under 15 minutes. Here’s why this matters: • Light weights, high reps build muscular endurance. Research shows lifting lighter loads (30–50% of your max) for higher reps (1