Jump with Gordon Ep 003 - Doubles and/or penalties?

Back at it today, June 20, 2025 and will try to do as many double-unders and crisscrosses to push my heart rate for this old fart who is currently 48 years old. According to many fitness trainers, what should my max heart rate be?

0:31 heart rate monitor - schoshe rhythm plus
0:51 beaded rope - from Buddy Lee
1:18 setting timer with app, 9 mins 45 sec followed with a 2 min rest to measure recovery
1:36 oh and by the way, do you see it, the incredible technology
1:48 114° bond angle water
2:22 setting a metronome tempo at 180 bpm in 4/4 time signature to establish tempo
3:47 the metronome is set pretty fast..
4:44 breathing technique
5:12 Buddy lee basic step
5:23 crisscross
6:00 let's see how many doubles I can do...
6:49 more doubles..
7:32 for those who watch, try to keep up
11:30 starting to push the pace..
12:00 should this be my calculated max heart rate?
12:08 last few seconds followed by 2 min rest, where you can hear my breathing rate
13:13 the elevation where I live
13:48 more or less recovered
14:15 debrief begins
15:32 extending the life of....
17:28 choices
17:50 I wish everyone...
18:01 this technology is made by