This article is an excerpt from our Sefer
7. Day of travel:
One is not to have relations on a day of travel, whether it be the day of leaving on a journey or the day of returning from a journey. [This refers to one who is traveling by foot, however, one who travels by transportation [car, bus, ship, plane] may have marital relations on the day of travel, whether before or after, and on the contrary, is obligated to do so, as explained in Chapter 2 Halacha 3C. Furthermore, some Poskim rule that although one who is traveling by foot is not to have relations on the day of travel, nonetheless, he is obligated to do so the night before. Furthermore, some Poskim rule that the above restriction for a foot traveler is due to health reasons, however, according to Halacha it remains permitted to have relations even on the day of foot travel, and hence he must appease his wife if he chooses not to do so.]
How much of a distance is defined as “travel” in the above regard?
Some Poskim rule that it is a distance of 12 Mil which is equivalent to 11.5 kilometers.
May one have relations on a day that he walked a long distance, such as the day of a family hike, or long jog and the like?
If one walked the above distance of 11.5 kilometers, and is very exhausted from the walk, then he is to avoid relations on the night prior to doing so (if he knew the travel would exhaust him), as well as the night after. [Although some are lenient on the night before, and even on the day of, as stated above.]
If one did a major body workout in the gym, or played an intense game of sports, may he have relations that day?
If one is very exhausted from the workout or sports game, then he is to avoid relations on the night prior to doing so, as well as the night after. [Although, some are lenient on the night before, and even on the day of, as stated above.]
 Michaber 240:15; See Sheyikadesh Atzmo 5 footnote 4
 See Ateres Zekeinim for how to interpret the day before and after
 Gloss on Michaber 240:15 [seemingly not from Rama]; Taz 240:1; Rashal on E.H. 25; Ateres Zekeinim; Elya Raba 240:23; Kaf Hachaim 240:17 concludes to have intimacy the night before travel if not traveling by foot
 1st approach in M”A 240:29; Rama in Teshuvah 132-2; Levush 240, brought in Taz 240:1; Bach E.H. 25:3; Ateres Zekeinim; Levush 240:15
Other opinions: Some Poskim negate the above understanding and rule that abstaining from intercourse applies even the night before. [Taz 240:1; Kaf Hachaim 240:17 concludes that the night before one is to appease his wife with words]
 Conclusion of M”A 240:29 based on Matanos Kehuna on Bereishis Raba Parsha 64; M”B 240:54; See Sheyikadesh Atzmo ibid
 Teshuvah Meahavah 1:34
 Darkei Taharah p. 212; Sheyikadesh Atzmo 2:3