<class 'pandas.core.frame.DataFrame'> RangeIndex: 169 entries, 0 to 168 Data columns (total 4 columns): # Column Non-Null Count Dtype --- ------ -------------- ----- 0 Duration 169 non-null int64 1 Pulse 169 non-null int64 2 Maxpulse 169 non-null int64 3 Calories 164 non-null float64 dtypes: float64(1), int64(3) memory usage: 5.4 KB None