You are interested in looking at fitness levels and nutrition of athletes in the NFL (National Football League) vs. the NHL (National Hockey League) in an effort to determine which sport has the best training regime.

Dependent variables that you are testing include: resting heart rate, heart rate following 20 minutes of strenuous activity, time to recovery to get back to resting heart rate, blood cholesterol level, and blood triglyceride levels.

What type of statistical analysis would you perform and why?