Our core body temperature varies, but tends to be higher later in the day. It rises until about 10:30 pm at night then it falls, and when it falls, that’s a signal to your brain to release melatonin. Being outdoors in summer weather and hot indoor environments (like that sweaty group fitness room at the gym) can make it harder for us to cool down.
Exercising also raises the body’s core temperature and it can remain raised for hours after our workout ends. "If you're too hot, you don’t get the melatonin release and that can inhibit your sleep," he explains.
Avoid exercising too close to bedtime, probably about two and a half to three hours before bed.
Keep your bedroom temperature at about 18 to 20 degrees at night, which is optimal for sleeping. During the summer, use air conditioning, fans and window shades to keep the bedroom cooler.
Tend to do something: if something tends to happen, it happens often and is likely to happen again
Melatonin: a hormone that is sometimes used as a drug to help you sleep
