how can I get google fit data's - node.js

Question

Hi how can I get the activity from google fit data. I have almost done all aspects after getting the access token how can I get the google fit datas, by using the below code I can get only this kind of response
code:
gFit.listExistingSessions(req.query.token,function(status,data){
// console.log('Sessions',data);
res.render('results', { resp: data });
});
response:
"session": [
{
"id": "3116a82009dd6cd7:activemode:running:1456064572752",
"startTimeMillis": "1456064572752",
"endTimeMillis": "1456114372880",
"modifiedTimeMillis": "1456745578987",
"application": {
"packageName": "com.google.android.apps.fitness"
},
"activityType": 8
},
{
"id": "3116a82009dd6cd7:activemode:running:1456064572752",
"name": "Evening running",
"startTimeMillis": "1456064572752",
"endTimeMillis": "1456114370411",
"modifiedTimeMillis": "1456745578992",
"application": {
"packageName": "com.google.android.apps.fitness"
},
"activityType": 8
},
{
"id": "3116a82009dd6cd7:activemode:biking:1456742139081",
"startTimeMillis": "1456742139081",
"endTimeMillis": "1456742187907",
"modifiedTimeMillis": "1456745578998",
"application": {
"packageName": "com.google.android.apps.fitness"
},
"activityType": 1
}
]
Can any one tell me how to get the calories burned, steps count, miles and minutes of each of the sessions.

Answer 1

According to their documentation, sessions are only a mean of organizing workouts, but they do not provide specific workout data. For that, you have to query datasets that overlap with the time interval of the session.
For more information on how to query specific datasets, see Working with datasets.
This is the example request for querying datasets:
https://www.googleapis.com/fitness/v1/users/me/dataSources/derived:com.google.step_count.delta:1234567890:Example%20Manufacturer:ExampleTablet:1000001/datasets/1397513334728708316-1397515179728708316
There, you have to replace com.google.step_count.delta with whatever data type you require, and also replace the timestamps at the end of the query with the ones that match your session start and end times.