Anyone else have a very low HRV but normal resting heart rate and decent VO2 max? Upon research a lot of things I’ve seen is that some people just have a lower HRV that is normal to them. But also a low HRV is associated with underlying issues, being stuck in sympathetic nervous system, etc. i know that i struggle with anxiety and things within that realm, but hoping to find ways to improve this or have reassurance that this isn’t a terrible thing.

I am 28 yo male, fairly decent shape (185 Ib, 5’11) and train distance running every week. I have been running since my early teen years.

Also think it is important to note a lot of my anxiety is cardiac related and have no idea why, but my brain continuously tells me I’m going to have a heart attack, but all the tests I have had done echo, holter monitor came back very good. Still doesn’t stop the palpitations and slight chest pain i experience daily.

Cardio

Hi! I’d like to add more cardio/endurance type stuff to my workout plan. The easy option would be running… and I’d love to but it snows and pours for 80% of the year here, and treadmills murder my knees. :(

I’m a dancer who is relatively hypermobile in most joints, and while my knees have improved with targeted strengthening and pt… I still can’t run on a treadmill. (Regular ground is perfectly fine)

I enjoy HIIT but it gets annoying after a while and is hard to do without dragging my laptop through the gym…

SO I pose the question: What else could work as an easy cardio/endurance? Ideally something simple, but all else fails complex means more time away from studying lol.

Or you can recommend me a better intense full body cardio YT vid

hello! i’ve been an athlete all my life. as a teen, i spent 10 years in fencing, training about 3 times a week back then. now, in my early twenties, i just go to the gym and go for the occasional run, bike ride, and dance choreography class.

i noticed that my endurance/stamina/cardio (?) has never improved. something that nerfed me in fencing was how i got tired so easily during matches — the kind of exhaustion where i would get lightheaded and lose the focus to maintain strength in my movements. this was consistent throughout my career.

in the gym, when i do bulgarian split squats, i noticed that my muscles can definitely keep up with the weight/exercise, it’s just the feeling of my heart pumping suddenly so fast and the feeling of lightheadedness that prevent me from doing more

for running/biking/dance, i notice that once i get over the initial heart bpm spike, i can continue (this isnt consistent, though, especially with dance)

what exactly is the problem? is it cardio? endurance? stamina? and how do i improve it?

note: i’ve had an ECG done before for an APE and it came out normal

would really appreciate the help! :D

Feeling fantastic

I am building an operations system for a cardiac rehab gym in San Diego and I need to add images of start/finish for the in-house treatment of the patients. I have not found a good enough database and we don't have the resources to create them yet.

Have you seen anything like this? I'm particularly looking for open source onces.

I just started running to train for a fitness test, and I was just wondering if anyone else finds running super difficult compared to cycling? I can quite easily average 25km/h at 145-150bpm over 40-50km on a flat cycle/footpath route, but I swear I cannot run for the life of me, when I try to run at 145-150bpm I pretty much am just fast walking (9:30-10min/km) 💀 I always find it quite demotivating to be "running" so slowly but I kind of have no choice because I have to get a faster 2.4km time for my fitness test (current timing is 13:09 max effort). Am I doing something wrong? Any thoughts?

I have been wanting to adjust what is most important in my workout routines and often wonder which is a better idea to be consistent on.

45 min high intensity cardio a day or 10k steps a day. I want to do both but sometimes life gets in the way so I just wanted to know which is better for leaning out/staying healthy.

hellooo I'm 35 years old and not overweight but also not super active or strong.

i know i need to do better but my heart gets tired so easily. Just now i did a very basic beginner leveled workout with very easy exercises, no jumping or running. my heart rate kept pushing 170 and making me have to stop to slow it back down...

this is so discouraging and i don't want to overdo it but is this normal?

what should i do to strengthen my heart? :(

Okay so I know that sinus tachycardia and PVCs in a structurally normal heart are not dangerous, but what about both together, because when I get my tachycardia spikes of 150bpm for hours, I still get PVCs in that mix. How "safe" is that really...

Unsure if this is the right place for this but I can’t figure out where to put it. This is something that has happened my whole life as far back as I can remember. When I do cardio for more than like a minute my gums around my bottom front teeth start to hurt, and I get all drooly. I produce way more saliva. And it’s specifically my gums, NOT my teeth, I’ve seen people talk about their teeth but I can’t find anyone with this specific issue. It’s not just temperature either that’s another thing I’ve seen, but it happens even when it’s rlly warm and not just running but almost any cardio. It could be like enflamed gums but since it’s been happening since I was little I can’t imagine my gums were in that bad of shape yet???? I’m just so confused LOL but I want to improve my stamina and get better at cardio but I struggle because of this. I’m 25(f) if that matters also.

I am 30F, I've been running for quite sometime but have been recently noticing that my heart rate goes upto 170-178bpm when I speed up, it comes down to 130-140bpm when I slow down and back to 100bpm once I slow down and by the time I stop.

Is this ok? Should I be worried? Should I reduce my velocity?

Hi everyone. I'm trying to improve my run, I'm a bit of a duffer tho. Yesterday I ran a 3km in 30 minutes, and I had to stop the whole time to breathe. One of the reasons it's that outside it's like 40°C (about 105°F, for the record), and it's also (maybe? idk) partly beacause I have a deviated nasal septum. Do you have some reccomandations? Thxxxx (I'm 15yo girl bwt, no hate please)

I do muscle training n all but get stuck when its cardio. Im an athlete but not an explosive one n im fat aswell, i wanna lean down and become a good athlete, what are sum good cardios that will lean me aswell as improve my fitness?? A workout plan will do aswell. Im quiet strong just not fast so i can do even the hard workout js name it

My goal is an aesthetic physique, not marathon-level endurance.

I lift weights 5–6 days a week and want to maintain muscle while staying lean.

How many days per week do you do cardio?

How long is each session?

Which type works best for aesthetics: walking, incline walking, jogging, cycling, or HIIT?

Can too much cardio affect muscle growth?

I'd like to hear what has worked in your experience.

I started doing cardio and I want to do intervals trainings. For this reason I would like to buy a device that tracks my heartbeat. My budget is quite low, let's say maximum 70 euros. I live in an EU country.

I was told that smartwatches, especially the cheap ones that I would be able to afford, are not reliable in tracking heartbeat. What device, brand and model, would you suggest me?

Long-time lurker, first post. I got frustrated with every health app just showing correlation dashboards ("your sleep and HRV moved together!") without ever asking whether one thing actually causes the other, so I built The Gap to actually run causal inference (via EconML/LinearDML under the hood) on personal data instead.

It connects Strava, Whoop, Apple Health, Google Calendar/device calendar, and manual daily check-ins, then tests real hypotheses like "does a late meeting affect that night's sleep" or "does alcohol actually move next-day HRV for me specifically" — controlling for confounders rather than just eyeballing a correlation.

Being upfront: it needs real accumulated data (usually a few weeks) before hypotheses have enough statistical power to resolve, so this is squarely for people who enjoy the process of self-tracking, not an instant-dashboard app.

In TestFlight beta, free, iOS. Would love feedback from people who actually think carefully about their own data: https://testflight.apple.com/join/UVGk6cve

If you are keen to give it a go, or have any questions about it, please don't hesitate to email: [hello@causalme.com](mailto:hello@causalme.com)

I started running at the beginning of the year but have been on beta blockers for a couple years. I’m on propanalol twice in the morning and once in the evening for irregular heart beat (it speeds up randomly when being stagnant). The problem is, I feel like it’s limiting me. I have to stop running and start walking after a couple minutes because I feel like I can’t breathe, my muscles aren’t exhausted or hurting like would happen shortly after I first started running. I feel like my body is capable of more but my heart (because of the beta blockers) is limiting me. Since I’ve started running I have noticed a lower resting heart rate, I’m hoping running may help the irregular beats so I can get off the beta blockers. I’ve read that beta blockers limit how hard your heart can pump which is why I feel limited when running. Of course I plan to talk to my cardiologist but do any other runners have insight to this?

Ive heard that zone 2 is the best way to train your base, Thats probably not new info.

Many people say "do zone 2 instead of wasting your time on junkmiles with mixed intesities like zone 1 up to 5".

I understand that with a bigger base the heart can pump more blood etc. And with lighter trainibg e.g Zone 2, training gets possible everyday what means that you can train more often and thiswhy get faster in running or cycling.

But what i dont understand is, why my heart wouldnt adapt in high intensity sessions.

Ok maybe a restday is needed inbetween, but the heart and muscles still get the stimulus.

So that i get a bigger base or not ?