During photosynthesis, light energy is used to produce ATP molecules which are then used to construct sugar molecules from carbon dioxide and hydrogen obtained from water. Chloroplasts have two outer membranes and several stacks of small disc-shaped membranes called thylakoids (also spelled thylacoids) inside.
Scheduling a week off will give your body time to do this and will also help you return to your workout stronger and ready to challenge your body once again. Many endurance athletes end their season with a week off and many weightlifters will take a week off from their program every four to eight weeks.
If your routine calls for you to isolate particular muscles, then you can lift more frequently. As long as you use different muscles in each workout. For example, if you did legs one day, you could do chest the next day, then back the day after that, then shoulders, then arms, etc. and workout 6 days a week. In practice, thatâs very hard to do in a pure isolated fashion.