Drill goal:
10 x STA with 1 minute of contractions. 2 minutes break in between each set

Unfortunately, the camera overheated at the end, which resulted in few sections with still frames. Not that it matters much

In collaboration with    / @pjfreediving   http://www.pjfreediving.pl

Measurement methodology:
HR measurements are done with Polar H10 chest strap

Time between HR recording and video is synchronized by calculating an offset between GoPro internal clock and Polar session start timestamp. Polar workout start timestamp is based on the clock of the phone it’s connected to. Before each pool session, a recording of the phone’s clock is captured, which ensures a correct time offset can be applied to eliminate potential differences between GoPro’s internal clock and HR recording timestamps. This ensures an accuracy of +/- 1s

HR sound is artificially generated based on https://github.com/bencholmes/heartbeat

Shot on May 10, 2024

Diver: Jacek

Timestamps
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00:00 - Breathe up 1
00:24 - 2m 30s
02:54 - OK

03:21 - Breathe up 2
03:43 - 2m 50s
06:32 - OK

06:40 - Breathe up 3
07:00 - 2m 18s
09:58 - OK

10:12 - Breathe up 4
10:31 - 3m 33s
14:03 - OK

14:41 - Breathe up 5
14:57 - 2m 49s
17:45 - OK

18:10 - Breathe up 6
18:23 - 3m 57s
22:20 - OK

22:47 - Breathe up 7
23:01 - 3m 41s
26:42 - OK

27:04 - Breathe up 8
27:24 - 3m 57s
31:20 - OK

31:46 - Breathe up 9
32:07 - 4m 40s
36:46 - OK

37:16 - Breathe up 10
37:36 - 4m 20s
41:57 - OK