A "conditioning tool" refers to something that is used to change or shape the behaviors or beliefs of a person or animal. It is typically used to train or control them in a specific way. Full definition
While they are a great conditioning tool, battle ropes never get used for strength training, or power output when in reality, they can be used for almost anything. (onnit.com)
This exercise can do a great job simulating the Bulgarian Bag swing another excellent conditioning tool for fighters. (onnit.com)
Performed for high reps, thrusters are an awesome conditioning tool which rival the mighty burpee whereas when performed with heavy weights, are a superb total body strengthener that teaches you to use your body as a single force - generating unit. (fitnessandpower.com)