By doing a search on this site you will find basic giudelines for fitness (especially in the recruiting forum). As long as you are able to meet if not exceed these guidelines and demonstrate that you have or are willing to improve yourself accademically and physically you will face no problems either transferring from reserves or applying through the regular process. As you may see there are those into their fourties that are currently training for the CF so as long as you dont see your age as an obstacle, neither will anyone else.Good Luck.