diff --git a/demo.py b/demo.py
index ad0a3d34..a1b0bca4 100755
--- a/demo.py
+++ b/demo.py
@@ -469,7 +469,10 @@ def __init__(self):
     "7": {
         "name": "🏆 Goals & Achievements",
         "options": {
-            "1": {"desc": "Get personal records", "key": "get_personal_records"},
+            "1": {
+                "desc": "Get personal records (decodes running typeId, interactive)",
+                "key": "get_personal_records",
+            },
             "2": {"desc": "Get earned badges", "key": "get_earned_badges"},
             "3": {"desc": "Get adhoc challenges", "key": "get_adhoc_challenges"},
             "4": {
@@ -3607,6 +3610,147 @@ def create_gear_data(api: Garmin) -> None:
         print(f"❌ Error creating gear: {e}")
 
 
+def _format_record_duration(seconds: float) -> str:
+    """Format a personal-record time value (seconds) as h:mm:ss or m:ss."""
+    total = round(seconds)
+    hours, remainder = divmod(total, 3600)
+    minutes, secs = divmod(remainder, 60)
+    if hours:
+        return f"{hours}:{minutes:02d}:{secs:02d}"
+    return f"{minutes}:{secs:02d}"
+
+
+def _format_record_distance(meters: float) -> str:
+    """Format a personal-record distance value (meters) as km."""
+    return f"{meters / 1000:.2f} km"
+
+
+def _format_record_count(value: float) -> str:
+    """Format a personal-record count value (e.g. steps) with thousands separators."""
+    return f"{round(value):,}"
+
+
+def _format_record_days(value: float) -> str:
+    """Format a personal-record day-count value (e.g. a goal streak)."""
+    days = round(value)
+    return f"{days} day" if days == 1 else f"{days} days"
+
+
+_RECORD_FORMATTERS = {
+    "time": _format_record_duration,
+    "distance": _format_record_distance,
+    "count": _format_record_count,
+    "days": _format_record_days,
+}
+
+
+def get_personal_records_data(api: Garmin) -> None:
+    """Get personal records, decoding typeId into a human-readable label
+    and value, and optionally looking up the source activity's details
+    (needed for longest-run duration, which isn't included in the
+    personal-record entry itself).
+
+    Two typeId ranges are confirmed against a real account's Garmin
+    Connect "Personal Records" page:
+      - activityType == "running": typeIds 1-6 are best-time records for
+        a fixed distance (value is a duration in seconds), typeId 7 is a
+        distance record (value is meters).
+      - activityType is None: typeIds 12-14 are step counts (day/week/
+        month), 15-16 are goal-streak day counts.
+    Anything else is shown as an unconfirmed raw value — check the Garmin
+    Connect "Personal Records" page for what it actually is rather than
+    trusting a guess here.
+    """
+    # (label, formatter key) — see _RECORD_FORMATTERS. Confirmed against a
+    # real account; see docstring.
+    running_type_info = {
+        1: ("1 km", "time"),
+        2: ("1 mile", "time"),
+        3: ("5 km", "time"),
+        4: ("10 km", "time"),
+        5: ("Half marathon", "time"),
+        6: ("Marathon", "time"),
+        7: ("Longest run", "distance"),
+    }
+    # activityType is None for these — steps/streak records, not tied to a
+    # specific sport.
+    other_type_info = {
+        12: ("Most steps in a day", "count"),
+        13: ("Most steps in a week", "count"),
+        14: ("Most steps in a month", "count"),
+        15: ("Longest goal streak", "days"),
+        16: ("Current goal streak", "days"),
+    }
+    try:
+        success, records = call_and_display(
+            api.get_personal_record,
+            method_name="get_personal_record",
+            api_call_desc="api.get_personal_record()",
+        )
+        if not success or not records:
+            return
+
+        entries = records if isinstance(records, list) else [records]
+        if not entries:
+            print("ℹ️ No personal records found")
+            return
+
+        print("\nPersonal records:")
+        for i, entry in enumerate(entries):
+            type_id = entry.get("typeId")
+            activity_type = entry.get("activityType")
+            value = entry.get("value")
+            if activity_type == "running":
+                info = running_type_info.get(type_id)
+            elif activity_type is None:
+                info = other_type_info.get(type_id)
+            else:
+                info = None
+
+            if info is not None and isinstance(value, int | float):
+                label, kind = info
+                formatted = _RECORD_FORMATTERS[kind](value)
+                print(
+                    f"{i}: {label} — {formatted}  (typeId={type_id}, raw value={value})"
+                )
+            else:
+                print(
+                    f"{i}: Unconfirmed record type "
+                    f"(typeId={type_id}, activityType={activity_type!r}, raw value={value})"
+                )
+
+        choice = input(
+            "\nEnter index to look up the source activity's details (blank to skip): "
+        ).strip()
+        if not choice:
+            return
+
+        try:
+            idx = int(choice)
+            if not (0 <= idx < len(entries)):
+                print("❌ Invalid index")
+                return
+        except ValueError:
+            print("❌ Invalid index")
+            return
+
+        activity_id = entries[idx].get("activityId") or entries[idx].get(
+            "activityIdInt"
+        )
+        if not activity_id:
+            print("ℹ️ This record entry has no activityId to look up")
+            return
+
+        call_and_display(
+            api.get_activity,
+            str(activity_id),
+            method_name="get_activity",
+            api_call_desc=f"api.get_activity('{activity_id}')",
+        )
+    except Exception as e:
+        print(f"❌ Error getting personal records: {e}")
+
+
 def set_activity_name_data(api: Garmin) -> None:
     """Set activity name."""
     try:
@@ -4580,11 +4724,7 @@ def execute_api_call(api: Garmin, key: str) -> None:
             "delete_weigh_ins": lambda: delete_weigh_ins_data(api),
             "delete_weigh_in": lambda: delete_weigh_in_data(api),
             # Goals & Achievements
-            "get_personal_records": lambda: call_and_display(
-                api.get_personal_record,
-                method_name="get_personal_record",
-                api_call_desc="api.get_personal_record()",
-            ),
+            "get_personal_records": lambda: get_personal_records_data(api),
             "get_earned_badges": lambda: call_and_display(
                 api.get_earned_badges,
                 method_name="get_earned_badges",
diff --git a/tests/test_demo_personal_records.py b/tests/test_demo_personal_records.py
new file mode 100644
index 00000000..86d9783d
--- /dev/null
+++ b/tests/test_demo_personal_records.py
@@ -0,0 +1,128 @@
+"""Regression tests for demo.py's personal-records interactive helper."""
+
+import sys
+from types import SimpleNamespace
+
+sys.modules.setdefault("readchar", SimpleNamespace(readkey=lambda: "q"))  # type: ignore[arg-type]
+
+import demo  # noqa: E402
+
+
+class _FakeAPI:
+    def __init__(self):
+        self.records = [
+            {
+                "typeId": 4,
+                "activityType": "running",
+                "value": 2400,
+                "activityId": 111,
+            },
+            {"typeId": 7, "activityType": "running", "value": 5000},
+            {"typeId": 12, "activityType": None, "value": 26246.0},
+            {"typeId": 15, "activityType": None, "value": 1.0},
+            {"typeId": 1, "activityType": "cycling", "value": 999},
+            {"typeId": 99, "activityType": None, "value": 42.0},
+        ]
+        self.get_activity_calls: list[str] = []
+
+    def get_personal_record(self):
+        return self.records
+
+    def get_activity(self, activity_id):
+        self.get_activity_calls.append(activity_id)
+        return {"activityId": activity_id}
+
+
+def _typed_inputs(*values):
+    it = iter(values)
+    return lambda prompt="": next(it)
+
+
+def test_decodes_running_time_record(monkeypatch, capsys):
+    api = _FakeAPI()
+    monkeypatch.setattr("builtins.input", _typed_inputs(""))
+
+    demo.get_personal_records_data(api)
+
+    out = capsys.readouterr().out
+    assert "10 km — 40:00" in out
+    assert "typeId=4, raw value=2400" in out
+
+
+def test_decodes_running_distance_record(monkeypatch, capsys):
+    api = _FakeAPI()
+    monkeypatch.setattr("builtins.input", _typed_inputs(""))
+
+    demo.get_personal_records_data(api)
+
+    out = capsys.readouterr().out
+    assert "Longest run — 5.00 km" in out
+
+
+def test_decodes_step_count_record(monkeypatch, capsys):
+    api = _FakeAPI()
+    monkeypatch.setattr("builtins.input", _typed_inputs(""))
+
+    demo.get_personal_records_data(api)
+
+    out = capsys.readouterr().out
+    assert "Most steps in a day — 26,246" in out
+
+
+def test_decodes_goal_streak_singular_day(monkeypatch, capsys):
+    api = _FakeAPI()
+    monkeypatch.setattr("builtins.input", _typed_inputs(""))
+
+    demo.get_personal_records_data(api)
+
+    out = capsys.readouterr().out
+    assert "Longest goal streak — 1 day " in out
+    assert "1 days" not in out
+
+
+def test_unconfirmed_types_are_shown_not_hidden(monkeypatch, capsys):
+    """Records outside both confirmed typeId tables must still be printed
+    in full (typeId + raw value), not dropped or given a made-up label.
+    """
+    api = _FakeAPI()
+    monkeypatch.setattr("builtins.input", _typed_inputs(""))
+
+    demo.get_personal_records_data(api)
+
+    out = capsys.readouterr().out
+    assert (
+        "Unconfirmed record type (typeId=1, activityType='cycling', raw value=999)"
+        in out
+    )
+    assert (
+        "Unconfirmed record type (typeId=99, activityType=None, raw value=42.0)" in out
+    )
+
+
+def test_looks_up_source_activity_by_index(monkeypatch):
+    api = _FakeAPI()
+    monkeypatch.setattr("builtins.input", _typed_inputs("0"))
+
+    demo.get_personal_records_data(api)
+
+    assert api.get_activity_calls == ["111"]
+
+
+def test_negative_index_is_rejected(monkeypatch, capsys):
+    api = _FakeAPI()
+    monkeypatch.setattr("builtins.input", _typed_inputs("-1"))
+
+    demo.get_personal_records_data(api)
+
+    assert api.get_activity_calls == []
+    assert "Invalid index" in capsys.readouterr().out
+
+
+def test_entry_without_activity_id_is_reported(monkeypatch, capsys):
+    api = _FakeAPI()
+    monkeypatch.setattr("builtins.input", _typed_inputs("1"))
+
+    demo.get_personal_records_data(api)
+
+    assert api.get_activity_calls == []
+    assert "no activityId" in capsys.readouterr().out