Heart Rate Zone CalculationsZone % ofMaximumHeart RatePerceived Exertion Benefits1 50–60% Relaxed, easy pace,rhythmic breathingBeginning-levelaerobic training,reduces stress2 60–70% Comfortable pace,slightly deeperbreathing, conversationpossibleBasic cardiovasculartraining, goodrecovery pace3 70–80% Moderate pace, moredifficult to holdconversationImproved aerobiccapacity, optimalcardiovascular trainingZone % ofMaximumHeart RatePerceived Exertion Benefits4 80–90% Fast pace and a bituncomfortable, breathingforcefulImproved anaerobiccapacity andthreshold, improvedspeed5 90–100% Sprinting pace,unsustainable for longperiod of time, laboredbreathingAnaerobic andmuscular endurance,increased powerVO2 Max. Standard RatingsThese tables include standardized classifications for VO2 max. estimates by age and gender.Males Percentile 20–29 30–39 40–49 50–59 60–69 70–79Superior 95 55.4 54 52.5 48.9 45.7 42.1Excellent 80 51.1 48.3 46.4 43.4 39.5 36.7Good 60 45.4 44 42.4 39.2 35.5 32.3Fair 40 41.7 40.5 38.5 35.6 32.3 29.4Poor 0–40 <41.7 <40.5 <38.5 <35.6 <32.3 <29.4Females Percentile 20–29 30–39 40–49 50–59 60–69 70–79Superior 95 49.6 47.4 45.3 41.1 37.8 36.7Excellent 80 43.9 42.4 39.7 36.7 33 30.9Good 60 39.5 37.8 36.3 33 30 28.1Fair 40 36.1 34.4 33 30.1 27.5 25.9Poor 0–40 <36.1 <34.4 <33 <30.1 <27.5 <25.9Data reprinted with permission from The Cooper Institute. For more information, go to www.CooperInstitute.org.Wheel Size and CircumferenceThe wheel size is marked on both sides of the tire. This is not acomprehensive list. You can also use one of the calculatorsavailable on the Internet.Wheel Size L (mm)12 × 1.75 93514 × 1.5 102014 × 1.75 105516 × 1.5 118516 × 1.75 119518 × 1.5 134018 × 1.75 135020 × 1.75 151520 × 1-3/8 161522 × 1-3/8 177022 × 1-1/2 178524 × 1 175324 × 3/4 Tubular 178524 × 1-1/8 179524 × 1-1/4 190524 × 1.75 189024 × 2.00 192524 × 2.125 196526 × 7/8 192026 × 1(59) 191326 × 1(65) 195226 × 1.25 195326 × 1-1/8 197026 × 1-3/8 206826 × 1-1/2 2100Wheel Size L (mm)26 × 1.40 200526 × 1.50 201026 × 1.75 202326 × 1.95 205026 × 2.00 205526 × 2.10 206826 × 2.125 207026 × 2.35 208326 × 3.00 217027 × 1 214527 × 1-1/8 215527 × 1-1/4 216127 × 1-3/8 2169650 × 35A 2090650 × 38A 2125650 × 38B 2105700 × 18C 2070700 × 19C 2080700 × 20C 2086700 × 23C 2096700 × 25C 2105700 × 28C 2136700 × 30C 2170700 × 32C 2155700C Tubular 2130700 × 35C 2168700 × 38C 2180700 × 40C 2200Appendix 19