If you change the language in the settings back to English you will have the exact English text.
It’s basically:
LTHR has increased by 4 bpm to 164 bpm which is calculated as 98% of 167bpm during 20 minutes.
So you did an effort, 20 minutes long, with an avg HR of 167. 98% of that is 164 bpm (rounded). And that is 4 bpm higher then what you have now in your settings (160 bpm) as LTHR.
@david it´s a problem in line 1903 in the language json.
It seems the {2} phrase is a fix combo of
“% of20 min at xxx bpm” in english,
so it´s not translated.
For german
"durch % von xxx bpm in 20 Minuten " um {0} auf {1} erhöht