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 you previously did weight training, reduce weights to around half of the weight you lifted before your break. Aim to work out two to three times per week and keep sessions less than 45 minutes for the first two to four weeks. Extend your warm-up and cool down to protect muscles and joints from injury.