Table 1.

Inclusion and exclusion criteria.

Screening	Inclusion criteria	Exclusion criteria
Phone screening	Age ≥65 years.	History of tumbling, gymnastics, or martial arts experience.
	At-risk of injurious fall as indicated by: 1) positive history of fall-related injury in the last year, or 2) experience of more than two falls in the last year, or 3) concerns related to changes of balance or walking [19].	Currently performing ≥150 min per week of vigorous physical activity or physical therapy.
	Independent walking (i.e., no use of walking aids).	Unable to walk household distances unassisted.
	Normal or corrected vision and hearing.	At-risk of bleeding, or currently taking the anticoagulants (e.g., warfarin, apixaban, rivaroxaban, and enoxaparin).
	Able to speak and comprehend written and spoken English.	Previous fragility fracture of the hip, spine or wrist.
		Weight >350 lbs.
Onsite screening	Bone mineral density of the hip ≥ −2.3 (i.e., t score ≥ −2.3, assessed via Dual Energy X-ray Absorptiometry).	Cognitive impairment as indicated by Saint Louis University Memory Scale (SLUMS) < 25.
	Balance impairment as indicated by performance <10 s on unipedal stance test [26].