Does porn make it so you can't feel endorphins from working out due to desensitization?

the 'endorphine rush' doesn't happen after your first few workouts. It might take a few months of regular training

 

If you are doing a cardio workout with a fixed amount of intensity for the duration of your workout, this may not be sufficient to give you the endorphin boost you are looking for. Perhaps consider trying High Intensity Interval Training (HIIT) or changing up your workout in another way to increase the intensity.

 

I think the risk of injury with HIIT depends on your fitness level. This article says the biggest risk is shoulder injuries.

Are you out of shape? If you're out of shape and/or highly concerned about injuries, you may be best off having a few sessions with a personal trainer and tell them that you're interested in starting HIIT. If you get a good trainer, they will carefully prepare you.

If budget for personal training is an issue, just go watch the HIIT at your gym (or check Youtube) one day, take a look at what they are doing and mindfully try it on your own.

Is the HIIT at your gym a "class" setting? One thing that I have always struggled with is wanting to look strong in front of others especially at the gym. Thus I would either push myself too hard and injure myself or I would avoid workouts that were too difficult/uncomfortable entirely, because I didn't want to embarrass myself. I am still working on letting go of those feelings in order to grow athletically, and it's really hard.

I wish you much good fortune and athletic growth bruv.

 

I get negative thoughts during yoga sometimes too. Utilizing ujjayi breathing helps. When you have a negative thoughts using this noting technique (it is marketed for meditation, but you can apply it to your yoga practice). Gently note the thought and return to awareness of your breath; this may allow you to get back into the flow of your physical practice.