437 - Running Running with this heat it's just like trying to breathe inside a furnace. For the first time in months, I've finished my running session without energy. I feel like someone beat me up. Haha! This is why avoid running in summer is highly recommended. I mean, I can't argue with that but it depends on your level of training and, of course, the temperature. Running at 05:00 am is not so energy-consuming, after all. Waiting for 07:00 or 08:00 am is a terrible mistake since the Sun is already high. At the same time, going for a run too early means getting less sleep and then being more tired. As always, the goal is to find the right balance.