A fun (but not pleasant) observation during my daily (once per two days) workout.
Today I was planning for a ~30 km cycling. Just at the start (less than 2 km I think), a random guy kept overtaking me with her fancy road bike (I'm riding an MTB). So the competitive side of me conducted a race (lasted for 3 km before we were stopped by the traffic light).
In the end, I overtook her with my bravery and experienced maneuver (when you have to compete with cars to avoid other cars that occupy the bike lane). But just waiting in front of the traffic light, I suddenly felt my legs start to lose their strength, my sight became fuzzy and the surroundings sounded like I was pulling out of my body. But the competitive side of me doesn't like losing, so I decided to turn to an alley and call it a tie, LOL.
The point is, I don't feel anything wrong when I am cycling, but once I stop, maybe 1 minute or so, the symptoms start.
(Disclaimer: I'm not an expert in bio-related fields, so there is my educated guess, not fact or reference.)
In the beginning, I thought it was blood sugar, maybe it was too low. I experienced similar things in high school when I finished my 1km running test and had to cycle back home in the middle of June around 3 pm. But that time I started feeling bad before I stopped. Then I got extreme hives and thankfully it did not last long.
But this time I started to feel bad after I was stopped. Someone suggests it's blood pressure. The hypothesis is that I'm doing aggressive ridding thus my body enlarges the vessels to deliver more blood to my legs, but then I suddenly stopped in front of the traffic light, the vessels didn't have time to response, so the blood pressure became too low.
So... I'm asking out of curiosity, did someone encounter similar things before? What is the cause of that? And more importantly, how to avoid that?
@skyblond You may need bp and blood sugar measures to sort out suggestions. Panasonic makes a quality battery powered bp cuff. To avoid cost, you might bike to a pharmacy with a bp booth, use same booth for comparisons bc booth readings will likely be off. Urine test is an old, finicky blood sugar method. But I think a food journal, tweaking your diet, will get closer to answers and corrective measure at no cost. Would you toot your progress?
@boxcars Probably not. I generally don't want to use those wearable devices since they increase the cost of me crashing.
Yesterday (I'm in UTC+8) I was riding about 30 km/h for 3 km, but several days ago I did get over 40 km/h for 500 m. Considering my diet is fairly stable, and I think it's likely to be the blood pressure.
I do have a plan to test it. If the weather doesn't stop me, I will find a longer road without traffic light, riding with the same speed but with a buffer to start and stop (not suddenly start and stop) and see what's going on. If everything is fine, then I think it means my blood sugar is totally fine to keep up with the strength. If not, then it will be complicated.