Please choose the correct ending to complete the given sentence: Health: [header] How to do hiit workouts during pregnancy [title] Do hiit workouts during the second and third trimesters. [step] Your first trimester is not the best time to do hiit workouts. Instead, the second trimester is a good time because you start to regain energy and feel less sick.

Ending1: Try to take a hiit workout during your period. [substeps] Do twenty middles (25 minutes) of high intensity workouts per week. Ending2: You can continue into the third trimester as long as you monitor how your body feels. If you get more fatigued during the last six weeks of your pregnancy, you may want to decrease the intensity. Ending3: Hiit workouts give you the energy to get your workouts going. Even with these exercises, you should still be moderately active for now. Ending4: This is especially good if you are pregnant or breastfeeding. You can do hiit workouts during the third trimesters so that you have to get up without burning out your body.

Answer format: ending1/ending2/ending3/ending4