Training and fatigue/intelligence/focus
I am a beginner athlete, I started structured training this September and right now I am at middle of building my base with trainderroad.com , I average about 70 miles/week (trainer/outdoors) + I run for about 5-7 mi/day. I lost about 20 lb of weight and overall I feel much better. But I have huge problem with my real job. My job is highly intellectually challenging, it demands focus and full concentration for about 5-6 hours a day if I lose focus or became less efficient I do not earn any money (more so likely lose some instead). I realize now that even after moderate intensity exercise I cant focus on my work after. I became distracted easily, my motivation in the drain, I want basically lay on couch and watch movies. That's not a big deal, I can do my routine after hours but there's bigger challenge: after moderate to high intensity training I feel absolutely useless for the next day and that's a total disaster. Last week I rode for about 45 miles one day and felt ok after (it's my first time that long) but on a next day I could not do my job effectively, same thing after 2 hr endurance ride on trainer. And since my fitness improving my exercises are becoming harder and my fatigue on next day is even worse. I love biking/running but I can't do much of exercises now because I can't afford to lose 50% of my days (day after each demanding exercise). What should I do? Will this improve after while? I can do some sacrifices if necessary because I believe that physical fitness will improve my working skills.
If you could recommend good schedule for me I would be entirely grateful. My work is simply 5-6 hours every day at any time (I can't take full day offs since my ability worsen and I have to do at least 2 hours every day) but except that I am free to do whatever. My main goal for training is to improve my intellect and focus.