Interval Training
60-59   [00-01] low   50-49   [10-11] low
59-58   [01-02] HIGH   49-48   [11-12] HIGH
58-57   [02-03] low   48-47   [12-13] low
57-56   [03-04] HIGH   47-46   [13-14] HIGH
56-55   [04-05] low   46-45   [14-15] low
55-54   [05-06] HIGH   45-44   [15-16] HIGH
54-53   [06-07] low   44-43   [16-17] low
53-52   [07-08] HIGH   43-42   [17-18] HIGH
52-51   [08-09] low   42-41   [18-19] low
51-50   [09-10] HIGH   41-40   [19-20] HIGH