Strength:  Strength refers to the physical properties associated with an individual's body that are instruments of power in a bodily sense.  Strength includes generative powers in the form of muscle, bone, and tissue, regenerative powers in the form of bodily systems such as the circulatory, respiratory, digestive, neural, and glandular, including reproductive powers - the physical capacity and power to procreate.    
Liberty's Hope achievement programs for increasing health and strength include:
Healthy Living
Health Care
Gardening and Horticulture
Culinary Arts
Physical Recreation  

Quest Clubs offers many badges to help young students develop their strength.  Look in the categories of DISCOVER AGRICULTURE, DISCOVER THE HOME, DISCOVER HEALTH AND SAFETY.