Yes, you need to reserve some energy until the sun sets, but it would be wrong to think that a good fitness level can only be achieved by doing high-intensity routines.
One is encouraged to exercise between 45 minutes and one hour before breaking of fast to avoid exhaustion and dehydration.
Here, Astro AWANI suggests some workout examples without using weights, with the guidance of fitness trainer Aimi Haziq.
These simple routines are good for muscle toning and body posture.