4 Reasons You're Not Gaining Muscle

so when it says to vary your rep range, how often is it suggested to do so?

I usually design myself a program that looks like this:

Week 1: Endurance Training 15- 20 reps 30 seconds rest
Week 2: Endurance Training 13-15 reps 30 seconds rest
Week 3: Hypertrohy Training 10-12 reps 2 minutes rest
Week 4 Hypertrophy Training 9-11 reps 90 seconds rest
Week 5: Hypertrophy Training 8-10 reps 60 seconds rest
Week 6: Hypertrohy Training 6- 8 reps 60 seconds rest
Week 7: Strength Training 3-5 reps 5 minutes rest
Week 8: Strength Training 1-2 reps 3 minutes rest

As the reps decrease the weight increases. At the end of and 8 week cycle I take a week of active recovery (i.e. yoga, hikes, etc)
then record and reassess my goals. This program is a generic program for Hypertrophy however it can be maniputaletd to change your goals. For example if I'm fighting I would do alot less hypertrophy and do more endurance and power training. As far as cardio goes I have heavy cardio in the Endurance phase of lifting and taper it down during the Hypertrohy and Strength phases.

Is it possible to gain muscle without any exercise? My health issues do not allow me to exercise,I am on bed rest so i have to depend only on decreasing calories to lose weight. Does this mean if I am losing muscle I will never regain it again? Very sad if this is true.

It is not possible to gain muscle without exercise. However, you can regain it again assuming that you can exercise when you recover. If you have a permanent disability, you should really talk to a physical therapist about the best things you can do to prevent atrophy as much as possible, plus they may have some suggestions that will help get some exercise based on your physical limitations .

This ^^^^^
Thank You Kindly for answering my question. I am told it is permanent . I eat a high protein diet I thought that helps build muscle is this true? Do you have any suggestion how not to lose the little muscle I have during weight loss?