I am a male 59 years old. I have been a highly competitive athlete for many years. No real issues, just minor muscle injuries from overuse or over exertions while competing. I took about a year off from my normal training regime. I have started training again on a regular basis. I am p!anning to do another Ironman distance Triathlon. I have done 13 previously along with racing at Kona in the World Championship. My issue is, my calves and the upper part of my Achilles just tighten up when I get out about 3 miles into my run, not really allowing me to continue. I have never had issues with my lower legs before. I have done all the typical treatments like I.C.E. stretching, ect. Any suggestions of why this could be happening or what I could do different to get past this. This has been going g on for about 4 months. Thanks in advance.