Yes, side delts respond better to higher reps. This is because they are a smaller muscle group and require more focus and effort to work them properly. When you use heavier weights, you are more likely to sacrifice form and not be able to target the side delts effectively. Additionally, side delts are made up of a higher percentage of slow-twitch muscle fibers, which respond better to higher reps.

A good rep range for side delts is 10-12 reps per set. You can also do sets of 15-20 reps, or even 20-30 reps. The key is to focus on using a weight that is challenging but allows you to maintain good form. You should also be able to feel the side delts working throughout the entire range of motion.

If you are looking to build bigger and stronger side delts, it is important to train them with a variety of exercises. This will help to ensure that you are hitting all of the different muscle fibers in the side delts. Some good exercises for side delts include:

• Lateral raises
• Front raises
• Bent-over lateral raises
• Cable lateral raises
• Face pulls

You can also add in some drop sets or supersets to your side delt workouts. This will help you to increase the volume of work and stimulate more muscle growth.

It is important to note that everyone responds to training differently. Some people may find that they need to use heavier weights and lower reps to see results in their side delts. If you are not sure what rep range is right for you, it is a good idea to experiment and see what works best.