Advice with running on cycle

hello, and thanks for the advice in advance. I’m looking to start my 4th cycle. I’ve ran one test at 400mgs every 3 days, and then 2 tren, test, and nano cycles. I loved the tren cycles great size gains and strength off the charts, but my cardio died. My run times are important for work, and I’ve seen people recommend running Anavar for people who do high amounts of cardio, but i was wondering about any personal experience or insights?