How do you calculate your intensity when performing cardiovascular activities (Running, Swimming, Rowing, Biking, Stationary Trainers etc)? 220 – (Your Age) x (the Percentage of Intensity) Example:  You're 25 years old 80% = Rate 156 beats per minute or 26 beats over 10 seconds (220 – 25 x .8) 88% = Rate 172 beats per minute or 28 beats over 10 seconds (220 – 25 x .88) 92% = Rate 179 beats per minute or 30 beats over 10 seconds (220 – 25 x .92) 96% = Rate 187 beats per minute or 32 Beats over 10 seconds (220 – 25 x .96) How do I calculate intensity when doing anaerobic activity (weightlifting)? Performing a full number of repetitions suggested in good form with the last repetition a challenge to complete, so find the appropriate weight that works for you! IF YOU HAVE QUESTIONS MY EMAIL IS STIEFELJT@HOTMAIL.COM