Tiredness and feeling sleepy almost all time even i do exercises 4 days a week... what are the causes ? and what should test i hv to do

Snoring?: Think snoring first. It's very common, and may cause severe sleep deprivation.

Sleepiness: Having excessive daytime sleepiness could indicate a sleep disorder. It's recommended you see a sleep doctor who can review your history to determine if that is the case or if it is something else. For example, if you also snore, have dry mouth, morning headaches, ; periodically gasp/choke throughout the night, you may have sleep apnea. Rls or narcolepsy depending on symptoms maybe causes as well.