It's not whether you live to 90 or not. It's your quality of life while you live to whatever age. Today, I did a full workout of TRX, rode with the wife (she is almost 77yo) for a few miles, rode another section to 24 hour fitness, swam for 40 minutes, rode back and met my wife for lunch. 20 miles of riding, 40 minutes of swimming, 40 minutes of resistance training and stretching. Great Day.