I ve been tracking my bbt and I m somewhat below average at about 96.5 in the follicular phase and 97-97.5 in the luteal phase. On a whim, I took my temp a few hours after running a half-marathon, expecting a higher than normal temp, but it was 94.0. I took it twice to be sure. After taking a hot bath (for my sore muscles), it went up, as expected to 98.3. What should I make, if anything of that low reading ? or my somewhat low bbt ?