A form of speed work. Means "speed play" in Swedish. Calls for repeatedly switching the pace from normal pace to fast for some distance, then returning to normal pace.
The main hip flexor and a complicated muscle group that is deep inside the trunk and cannot be seen from the outside.
- to require or constrain, as by law, command, conscience, or force of necessity.
- to bind morally or legally, as by a promise or contract.
- to place under a debt of gratitude for some benefit, favor, or service: I'm much obliged for the ride.
- to put (one) in a debt of gratitude, as by a favor or accommodation: Mr. Weems will oblige us with a song.
- to make (an action, policy, etc.) necessary or obligatory: Your carelessness obliges firmness on my part.