I need to know if this is a one way ANOVA test or a two way. also, I need a break down of the results and what they tell you. please be as specific as you can because I need to write a paper about the results and I do not understand them.

Researchers wanted to determine the effects of exercise on stress. They divided a random sample into groups, with each group having a specified level of exercise. A pretest of stress levels was given to all participants to establish a baseline. One group had strenuous exercise, another had moderate exercise, and another was the control group which had no exercise. After the exercise period, a posttest was given to measure the stress level. The scores for comparison were calculated by subtracting the baseline stress measurement from the final stress measurement. Here is the ANOVA table with the results. Source MS Between 4,689.27 2 344.635 0. 7664 Within 82,604 20 3 059 415 Total 87,293:47