Blood vessels after FUE

My surgeon told me not to do jogging for about 1 month after my FUE. He: "New blood vessels are not so strong during the first 3 weeks and might get destroyed if there is a constantly higher pulse rate and blood pressure. If those blood vessels get destroyed, not all of them might come back and one can loose another 10-15% of the transplanted grafts." So my question is - why has nobody of you doctors in this forum ever drew attention to that? Is my surgeon telling the truth?