VO2max is a measure your body’s innate ability to process oxygen so you’re pretty much stuck with the number you’ve got. It is not something you can improve with training but it can go up or down slightly (+/- 10%) by gaining or losing weight (reducing the Kg in the mL/Kg/min).
Actually, you can improve VO2max in two ways, by losing weight and by training.
Losing weight: At 6’ and 182 lbs, if the original poster lost 27 pounds (to get to 155) his VO2max would be 53.7, a 17% increase. This is much more than the 10% you indicated was possible, and would be pretty darn good for a 57 year old.
Training: It’s a common misperception that “you’re stuck with what you’ve got” when it comes to VO2max. Your upper limit may be genetically determined, but you have to train pretty hard and pretty consistently to get there. See quote below.
Bottom line: unless the original poster already has extremely low body fat and is a highly trained athlete, chances are that his VO2max can be improved quite a bit.
http://www.exercisestandards.org/vo2.htm
**How much can V02 max be improved? **
For years, researchers have found wide variations in improvement in V02 max with training. In one study, men and women endurance trained for 9 to 12 months. Improvement in V02 max ranged from 0% to 43%, even though all the subjects completed exactly the same training program.
Bouchard has now clearly established that the response to a training program is genetically determined. Ten pairs of identical twins completed a 20 week endurance training program. Improvements varied from 0% to nearly 40%. These results, and those from other studies, indicate that there will be responders (large improvement) and non-responders (little or no improvement) among groups of people who experience identical training programs.
Costill and Wilmore suggest that in fully mature athletes, the highest attainable V02 max is reached within 8 to 18 months of heavy endurance training, indicating that each athlete has a finite attainable level of oxygen consumption. However, endurance performance continues to improve with continued training for many additional years. Factors contributing to this continued endurance performance are lactate threshold and economy of movement.