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 I am using SSWHR Baro, software ver. 2.8.24. I can not find option to turn on interval training in my custom sport mode for running (in basic running mode I still can turn on interval) 
 Please help
  
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 did you add a interval screen to the custom activity? 
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 @Saketo-Nemo Thank you, I forget to add interval screen. I think Suunto should turn on interval option even when no interval screen added. Solved 
