Table 4. Adverse Events.

	SCT group (n = 79)	Standard group (n = 80)	No group (n = 11)
Serious adverse events*	2(1)	2(1)	0(0)
Heart attack-related symptoms–Chest pain, difficulty breathing, fatigue	0	1	0
Musculoskeletal pain & difficulty breathing	0	1	0
Prolonged musculoskeletal pain	1	0	0
Prolonged joint pain	1	0	0
Injury or musculoskeletal discomfort	26(15)	26(15)	2(1)
Side effects and complaints
Shoulder pain	3(2)	3(2)	0(0)
Aggravation of preexisting arthritis	2(1)	2(1)	0(0)
Tendonitis	1(1)	0(0)	0(0)
Back pain	6(4)	4(2)	1(1)
Ligament or tendon tear/pain	0(0)	3(2)	0(0)
Pinched nerve (sciatic, femoral, or cervical)	2(1)	1(1)	0(0)
Musculoskeletal injury due to accident while exercising	0(0)	2(1)	0(0)
Musculoskeletal injury due to accident outside of RT program	0(0)	2(1)	1(1)
Inflammation/swelling	2(1)	2(1)	0(0)
Other musculoskeletal discomfort	10(6)	7(4)	0(0)
Other medical events	3(2)	3(2)	0(0)
Surgery (heart stent, foot, hand, melanoma)	2(1)	2(1)	0(0)
Heart attack-related symptoms	0(0)	1(0.6)†	0(0)
Other	1(0.6)	0(0)	0(0)

Notes: Data are number (percentage) of participants. The “No group” category indicates participants who withdrew from study during the Initiation phase, before randomization occurred. RT = resistance training.

The difference in adverse events between Standard vs. SCT was not significant

[χ² (df = 2, N = 159) = 0.44 (p = 0.80)].

* Serious unanticipated or anticipated problems, including study-related prolonged (>3–4 days) muscle pain.

† Reported after check-up with primary care physician; all tests were normal.