I gave blood today, which I do every couple months when the bloodmobile comes to mu work place. You know they do that whole BP, HR, iron thing first. My normal stats are 120/80 BP, 66-68 HR, and 13 on the iron count. I've started a primal lifestyle (almost 4 weeks now) since the last blood drive. Stats today at 2 PM after a cup of coffee and a vouple cups of tea and chatting through all the measurements were significantly different in some areas. 121/71 BP so not all that different. HR 52 which had me and the tech going WOW! And 15.1 on the hemoglobin. I'm not an athlete by any stretch. I walk the dogs a little over a mile nightly. I get up from my desk hourly and walk 5-10 minutes including climbing a total of about 39 flights of staies throughout the day, and if I'm not suffering from PF I might jog/walk a couple miles once or twice a week. This week I started doing an at-home beginner Crossfit program. I don't get dizzy or lightheaded or anything like that, but I did everyday before my primal switch. I'm not sure if I should beconcerned about these things or take something like the lower heart rate as a sign of my body not being wheat-stressed anymoreand therefore ok. What do you guys think? Have you had any similar experiences? Oh, also, 20 years ago when I was super fit (ran 3 miles every other day, rode 5-10 horses a day and did all the farmwork), my resting HR was 44bpm so maybe its just natural for me.