I got a Whoop strap because I’m an analytical kind of guy and I want to make sure I’m doing the best training I can. I got it kind of late in the season last year, so I was in race mode for a couple of weeks then I was in “just maintain fitness and hope I don’t get sick this winter and blow it all” mode.
I was very disappointed when I first got it, because in the first week I mowed my grass and discovered it thought my heart rate was higher than the highest I’ve ever seen in any workout, race or stress test. I think it was picking up vibration from the mower and measuring about 100 bpm higher than reality. After using it for paddle workouts and races and comparing to what my Wahoo TIKR measures, it was reading about 20 bpm too high, probably due to the impact of my paddle catch. Whoop suggested I try (i.e. buy) their bicep band, which seems to have solved the problem.
But even with that strap change, I would come off 5 straight days of training and take a rest day, and wake up on race day and it would telling me I was in the red or yellow zone for recovery, which is demotivating. Then I’ve have a really good race in spite of what it said. The next day I’d wake up tired and sore and barely able to walk, and it would say I was 86% recovered and I should do a hard workout. So it’s not exactly providing me with useful information. I was hoping that now that it’s spring and I’m going to start being in “train like hell because the season starts in 2 months” that it would start giving better data.
There are design details of the Whoop strap that I absolutely love and others I completely, 100% hate hate hate. On the love side, I like the way you recharge it without having to take it off by having a recharging battery that sort of clamps on top of the strap for an hour or two and it’s recharged. On the hate hate hate side, the biggest problem is the strap. They only anchor it on one end and it’s supposed to be held in place by these two very shallow vanes that do practically nothing. It was bad enough on the wrist strap, but on the bicep band where your bicep changes diameter every time your move your arm it’s utterly useless. I end up constantly fiddling with it. It seems like hardly a minute goes by without looking down and seeing the green lights because it’s slipped sideways under the band and it’s not pressing the lights into your muscle.
Ironically, the only time it doesn’t slip sideways under the strap is when you’ve got the recharging battery clamped on top because the battery clamps over the strap. I asked a friend with a 3-d printer if he could make something that like just the clamp part of the battery so I could wear that all the time, but it has springy metal to hold it on. I’ve also tried scotch tape and duct tape to hold the loose end of the strap down. Doesn’t work well.
So anyway, I can’t currently find the battery. Whoop wants a ton of money for a replacement ($50 plus shipping), and frankly if the battery doesn’t show up in a day or two I’m going to take the strap off and leave it off, because it’s just not working out for me and I’m not going to throw good money after bad.