"... the risk of increased injury is easily addressed by choice of exercise - swimming, rowing, etc. ..."
what about your bones?
"... The best exercise for your bones is the weight-bearing kind, which forces you to work against gravity. Some examples of weight-bearing exercises include weight training, walking, hiking, jogging, climbing stairs, tennis, and dancing. Examples of exercises that are not weight-bearing include swimming and bicycling. Although these activities help build and maintain strong muscles and have excellent cardiovascular benefits, they are not the best way to exercise your bones. ..." ~ http://www.niams.nih.gov/Health_Info/Bone/Bone_Health/Exerci...
"... combine swimming/rowing/bicycling for its anti-aging benefits with weight lifting ..."
The study was looking at how endurance exercise reduced mitochondrial damage. Rowing, riding and swimming are endurance sports, so most likely yes.
"... The systemic mitochondrial rejuvenation through endurance exercise promises to be an effective therapeutic approach to mitigating mitochondrial dysfunction in aging and related comorbidities. ..." ~ http://www.pnas.org/content/early/2011/02/18/1019581108.abst...
what about your bones?
"... The best exercise for your bones is the weight-bearing kind, which forces you to work against gravity. Some examples of weight-bearing exercises include weight training, walking, hiking, jogging, climbing stairs, tennis, and dancing. Examples of exercises that are not weight-bearing include swimming and bicycling. Although these activities help build and maintain strong muscles and have excellent cardiovascular benefits, they are not the best way to exercise your bones. ..." ~ http://www.niams.nih.gov/Health_Info/Bone/Bone_Health/Exerci...