Tagesübung

09:12 May 12, 2017 

I'd humbly suggest you either keep the noun structure, similar to what they did here:
"According to the Centers for Disease Control and Prevention (CDC), adults need at least 150 minutes of moderate physical activity or 75 minutes of vigorous activity each week, along with a minimum of twice-weekly strength-training sessions."
http://www.livestrong.com/article/438399-what-is-a-good-dail...

Or rephrase:
"a regimen consisting of a short workout routine you do each day and a longer one you only do on certain days (of the week/throughout the six-week period)"

09:06 May 12, 2017 

After discussing several of your questions, I'm slowly but steadily starting to get really mad at my fellow countrymen and women because of their seeming lack of ability to write clear and unambiguous sentences.

The compound noun "Tagesordnung" can be interpreted in at least four(!) different ways:

1) daily exercises: http://www.dbkg.de/behandlungsangebot/besondere_angebote/tag...

Not applicable here, since you need to draw a distinction between "täglich" and "Tagesübung."

2) As you suspected, a full-day exercise. That can't be it either, since "Body-Scans" typically take around 15 minutes: http://ich-will-meditieren.de/meditationstechniken/bodyscan/

3) A longer, but different exercise for each day of the week. That would be in line with the first answer.

4) A longer exercise on certain days, but not every day of the week.

You may discern what's correct from the rest of the document you have before you. If it's option 3, I do think Phil makes a very good point about the needless repetition of "Tag."

For some reason, though, I tend towards option 4 because your sentence reads "an speziellen" Tagen.