2. Pop in headphones.
You can fight flagging energy with music: Working out to your favorite fitness playlist can help you to go up to 20% longer and burn more calories, finds a study from West London’s Brunel University. Music blocks fatigue, produces feelings of vigor, and helps you keep pace by synchronizing your movements, says study author Costas Karageorghis, PhD. (Check out what fitness pros have on their playlists.)